![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
It seems I am getting duplicate messages from mailman v2.1.5 when senders send both TO and CC to the list. For some reason no one else in the list is acknowledging this issue so I look like an idiot complaining about it, but I'm seeing several instances of it per day.
I do not get dupes of all mails otherwise I'd suspect double subscription. The Avoid Duplicates flag is set. This only happens for mails that have the list in the CC - I understand the dupe flag is for when people use ReplyAll and the recipient is in both the list of subscribers and the CC for the mail. I believe the code is supposed to filter duplicate Message-IDs to a given recipient no matter how those dupes are generated, but I'm getting them. Any ideas?
Thank you kindly.
![](https://secure.gravatar.com/avatar/e6ea3e5ffc3558c74e9f8cbf3f38357a.jpg?s=120&d=mm&r=g)
At 8:28 AM +0000 2006-04-30, Tony G wrote:
It's not just the recipient, but the exact same recipient
address. So, if you're subscribed to the list with one address, and they cc: a different address of yours, then the system has no way to tell that these are both the same person.
No, the code doesn't work at the Message-ID level. It works at
the level of the listed recipients in the To: and CC: headers.
If you want filtering done at the Message-ID level, then you need
to apply that on your end -- either use a program like procmail to filter all your incoming mail, or set up your MUA to discard duplicates, etc....
There's nothing more that Mailman can do to help you.
-- Brad Knowles, <brad@stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
LOPSA member since December 2005. See <http://www.lopsa.org/>.
![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
Brad Knowles wrote:
No one on this list has any other address of mine and the dupes aren't to threads where I have posted. Checking with individuals and the headers I am not being sent mail from anywhere except mailman.
I was mislead by discussions like these: <http://mail.python.org/pipermail/mailman-developers/2001-August/009467.htm l> <http://mail.python.org/pipermail/mailman-developers/2002-March/010911.html
And this code referred to in one of those threads: <http://www.opensource.apple.com/darwinsource/Current/mailman-117/mailman/M ailman/Handlers/AvoidDuplicates.py>
I am filtering the dupes. What confuses me is that they are only coming from one list that uses mailman. You sent TO me and CC'd the list but I only got one copy as one would hope. It's for this reason that I suspect that this other list (mono-list at ximian) have some broken version of Mailman. Of course they put the blame back on my server or MUA. All I'm trying to do here is diagnose and help people to fix open source software. Isn't that why we're all here?
Thanks.
![](https://secure.gravatar.com/avatar/746f7519ba02fb0d815e59f305c53fa2.jpg?s=120&d=mm&r=g)
Tony G wrote:
Yes, but these are discussions of a suggested patch that isn't in the current distribution.
And this code referred to in one of those threads: <http://www.opensource.apple.com/darwinsource/Current/mailman-117/mailman/Mai...>
This is presumably Apple's code, not ours, but it does essentially what our AvoidDuplicates handler does which is not send to any list member who has requested to avoid duplicates and who's address is in the To: or Cc: of the message. This doesn't avoid sending two messages with the same message id to the same person. It only avoids sending a post from the list to the user if the user might have received it directly and we can determine that.
More in my next reply.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
![](https://secure.gravatar.com/avatar/746f7519ba02fb0d815e59f305c53fa2.jpg?s=120&d=mm&r=g)
Tony G wrote:
It seems I am getting duplicate messages from mailman v2.1.5 when senders send both TO and CC to the list. For some reason no one else in the list is acknowledging this issue so I look like an idiot complaining about it, but I'm seeing several instances of it per day.
Brad has already provided good information in his reply. I just want to add that it looks to me like in this case, the sender's MUA is actually giving the list address twice (once for To: and once for Cc:) to the MTA, and the MTA is not dropping the duplicate recipient. Thus, two copies of the post are actually being sent to the list. Do the duplicates appear twice in archives and/or digests? (I think the duplicate may be dropped from the archives if the message-id is the same, but I'm not sure).
Other subscribers may not see this because their incoming MTA/MUA may drop duplicate message-ids.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
Mark Sapiro wrote:
As I mentioned in my response to Brad, I'm not even involved in the discussions where I'm getting the dupes. This would be an obvious source of duplication. I'm just another quiet recipient to the list (hehe, until now anyway) and there's no reason for me to be explicitly identified in the TO or CC.
No, only one copy of every post is in the archives and no one else is reporting dupes.
Other subscribers may not see this because their incoming MTA/MUA may drop duplicate message-ids.
As with most OSS projects there is a heavy bias away from Microsoft software, including Outlook which I use. Chances are slim that others in this OSS forum are using Outlook and thus their MUAs might be filtering away the problem. So I was suspecting my MUA. However, I do not get dupes when people in this mailman-users list CC the list but I do get some dupes from that group - obviously the same MTA/MUA tiers are involved. This is why I have been suspecting something in the list software that is different. Maybe there's a patch or addin that they've installed that corrupted this dupe-filtering code? That's what brought me here - Until now I've had no idea if this was an issue specific to that group or something that was introduced in the v2.1.5 code that you guys would know or want to know about.
Thanks again.
![](https://secure.gravatar.com/avatar/746f7519ba02fb0d815e59f305c53fa2.jpg?s=120&d=mm&r=g)
Tony G wrote:
Right, but you said when you receive duplicates, the list was addressed twice in the post, once in To: and once in Cc:. Thus, I am suggesting that the list actually receives the post twice and sends it twice and that's why you get two copies.
Does anyone receive digests to confirm or deny the presense of dups in a digest. I haven't looked at the code for this right now, but as I said, I think pipermail may drop dups from the archive, so the absence of dups in the archive is not definitive.
There may be something here with digests too, but I don't think so.
The process of your not getting a dup when I address my reply to both you and the list IS a Mailman process. You only get the direct message from me because you have requested no dups, and Mailman sees your address in the To: of my post so it doesn't send to you.
This is not the case on the other list where maybe the list receives the post twice.
I don't think it's Mailman per se, but I can't be sure without knowing what is happening. I still think it could be actually two copies of the post reaching the list, but the fact that no one else on the list admits to receiving dups makes this seem unlikely. I would like to help you get to the bottom of this if I can.
I think the next thing is to collect both copies of some duplicated posts with full headers and examine the Received: chains in each to try to determine where the duplication is occurring. If you need help with this, you can post headers from duplicated posts to this list or send them to me off list, and I will try to help.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
![](https://secure.gravatar.com/avatar/746f7519ba02fb0d815e59f305c53fa2.jpg?s=120&d=mm&r=g)
Mark Sapiro wrote:
Another thing you can do if you have access to Mailman's logs is to check the post and smtp logs to see if the entire post is being sent twice.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
Mark Sapiro wrote:
I mis-spoke. It only occurs in that one list when someone CC's the list. I would understand if it were in both TO _and_ CC. Since all lists and MUA's are different, people don't know whether to Reply or Reply-All, so it's 50/50 whether the list address will be in the TO _or_ CC, but most people know to not double up.
There may be something here with digests too, but I don't think so.
I have not asked about digests but I don't think I'll find anything there either.
Remember that I am not involved in the discussions where I get the dupes. I understand the mailman code filters possible dupes when TO = a subscription address.
I have confirmation from a single Outlook user that I get dupes when they do not. (I wish I had a larger sampling of responses over a longer period of time but I'll take what I can get.) This points to an MTA issue and not list or MUA. I am now checking in that area. Again the problem is that I only get dupes to this one address when the list is in the CC. I can't believe an MTA bug would be that specific so it might be some timing issue, a hiccup during greylisting processing, etc.
Over the last month or two I have been going over the headers myself and the headers on each copy of the mails are exactly the same: same Received path and time stamps, and same Message-ID (!!). The only pattern between what generates dupes and what does not is that the list address is in the CC of duped mails - but only on that list, not in this mailman-users list. :(
Please allow me a few days to pursue the MTA route and I'll post a note here to let you know if I find anything. Based on your comments and info from the other list I'm fairly convinced that I shouldn't be wasting any more of your collective time. But I will let you know what I find out.
Thank you kindly for your dedicated interest.
![](https://secure.gravatar.com/avatar/54359ad46cfdfe2845f8c1d0975449d0.jpg?s=120&d=mm&r=g)
On 4/30/06, Tony G <4ylyh9g02@sneakemail.com> wrote:
I haven't been following this thread too carefully, but a couple of things clicked together based on some duplicate issues I've seen with my users.
Just to recap the details as I recall them
- You are the only one seeing the duplicate e-mails
- You are using Outlook.
- Duplicate e-mails are idendical down to the header level.
- Only happens on 1 list.
- Only happens when the list is in the CC header.
If all the above are correct, check your Outlook rules. Outlook may be the cause of the duplicates.
I've spent a TON of time trying to diagnose this for one user and it turned out it was her Outlook rules that caused the duplicate.
I don't use Outlook myself, but try disabling the rule for a while and see if the duplicates still happen. If not, then recreate the rule.
I know this isn't Mailman related, but I think that this may be a good cause for the archive.
-- Bryan Carbonnell - carbonnb@gmail.com Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "What a great ride!"
![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
I just wanted to close this old topic with a thanks to Bryan Carbonnell (and anyone else) who successfully diagnosed the issue of mail duplication as mis-configured Outlook rules rather than a problem with mailman processing CC, reply-to, etc..
Thanks to anyone who responded. I'll go flog myself once for every person who's time has been wasted here. :) Tony
Bryan Carbonnell wrote:
![](https://secure.gravatar.com/avatar/e6ea3e5ffc3558c74e9f8cbf3f38357a.jpg?s=120&d=mm&r=g)
At 5:49 PM -0700 2006-04-30, Tony G wrote:
If the headers really are completely identical, including all
queue ids and time stamps in the "Received:" headers, then the only machine that could be causing the duplication is the MTA of your mail services provider.
With a few header samples of various messages, we should be able
to figure out what's going on. Or, at least get a better idea of what additional information we may need.
-- Brad Knowles, <brad@stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
LOPSA member since December 2005. See <http://www.lopsa.org/>.
![](https://secure.gravatar.com/avatar/e3f756085bb13a7ba37646802f912792.jpg?s=120&d=mm&r=g)
On 4/30/06 1:28 AM, "Tony G" <4ylyh9g02@sneakemail.com> wrote:
I'm seeing duplicates too, reading in Microsoft Entourage (which differs greatly from Outlook). I haven't taken the time to analyze them (delete works fine). Since some of them are in threads crossposted to users and developers lists, I see four copies of those.
Two copies of a message with this Message-Id: Message-Id: <1146489146.11009.13.camel@geddy.wooz.org> Message-Id: <1146489146.11009.13.camel@geddy.wooz.org> reached me through the developers list (based on the List-xx headers)
This is the one in which Barry started out "I agree that we need a lot more data"
And two more copies came via the users list.
--John
![](https://secure.gravatar.com/avatar/e3f756085bb13a7ba37646802f912792.jpg?s=120&d=mm&r=g)
On 5/1/06 7:47 AM, "John W. Baxter" <jwblist@loricamail.com> wrote:
Tony, I think you need to review your Outlook rules.
My duplications are produced in our mail server's mail sorting process, and the key is the presence of prefixes for both -users and -developers in the Subject: lines of the problem messages.
Considering only the two copies from the Developers list, the divergence appears to be in our mail processing. The messages arrived our our world-facing machine with the same Exim Id:
Received: from smtp-vbr8.xs4all.nl ([194.109.24.28]:3979) by entiat.olympus.net with esmtp (Exim 4.42) id 1FaYCW-0006pK-O1 for jwblist@loricamail.com; Mon, 01 May 2006 06:12:33 -0700
and
Received: from smtp-vbr8.xs4all.nl ([194.109.24.28]:3979) by entiat.olympus.net with esmtp (Exim 4.42) id 1FaYCW-0006pK-O1 for jwblist@loricamail.com; Mon, 01 May 2006 06:12:33 -0700
(ie, the same).
And having looked at the server logs, I now know what is happening in my case. I have our mail processing sort list mail into IMAP folders based on--in the case of these lists--the presence of the subject prefix, and these messages have prefixes for both lists in the Subject: header.
So my copy for -users gets sorted into my folders for -users and for -developers, and my copy for -developers gets sorted into -users and into -developers.
Note: the next revision of our mail processing will allow sorting based on arbitrary headers--the List- headers for example.
![](https://secure.gravatar.com/avatar/e6ea3e5ffc3558c74e9f8cbf3f38357a.jpg?s=120&d=mm&r=g)
At 8:28 AM +0000 2006-04-30, Tony G wrote:
It's not just the recipient, but the exact same recipient
address. So, if you're subscribed to the list with one address, and they cc: a different address of yours, then the system has no way to tell that these are both the same person.
No, the code doesn't work at the Message-ID level. It works at
the level of the listed recipients in the To: and CC: headers.
If you want filtering done at the Message-ID level, then you need
to apply that on your end -- either use a program like procmail to filter all your incoming mail, or set up your MUA to discard duplicates, etc....
There's nothing more that Mailman can do to help you.
-- Brad Knowles, <brad@stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
LOPSA member since December 2005. See <http://www.lopsa.org/>.
![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
Brad Knowles wrote:
No one on this list has any other address of mine and the dupes aren't to threads where I have posted. Checking with individuals and the headers I am not being sent mail from anywhere except mailman.
I was mislead by discussions like these: <http://mail.python.org/pipermail/mailman-developers/2001-August/009467.htm l> <http://mail.python.org/pipermail/mailman-developers/2002-March/010911.html
And this code referred to in one of those threads: <http://www.opensource.apple.com/darwinsource/Current/mailman-117/mailman/M ailman/Handlers/AvoidDuplicates.py>
I am filtering the dupes. What confuses me is that they are only coming from one list that uses mailman. You sent TO me and CC'd the list but I only got one copy as one would hope. It's for this reason that I suspect that this other list (mono-list at ximian) have some broken version of Mailman. Of course they put the blame back on my server or MUA. All I'm trying to do here is diagnose and help people to fix open source software. Isn't that why we're all here?
Thanks.
![](https://secure.gravatar.com/avatar/746f7519ba02fb0d815e59f305c53fa2.jpg?s=120&d=mm&r=g)
Tony G wrote:
Yes, but these are discussions of a suggested patch that isn't in the current distribution.
And this code referred to in one of those threads: <http://www.opensource.apple.com/darwinsource/Current/mailman-117/mailman/Mai...>
This is presumably Apple's code, not ours, but it does essentially what our AvoidDuplicates handler does which is not send to any list member who has requested to avoid duplicates and who's address is in the To: or Cc: of the message. This doesn't avoid sending two messages with the same message id to the same person. It only avoids sending a post from the list to the user if the user might have received it directly and we can determine that.
More in my next reply.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
![](https://secure.gravatar.com/avatar/746f7519ba02fb0d815e59f305c53fa2.jpg?s=120&d=mm&r=g)
Tony G wrote:
It seems I am getting duplicate messages from mailman v2.1.5 when senders send both TO and CC to the list. For some reason no one else in the list is acknowledging this issue so I look like an idiot complaining about it, but I'm seeing several instances of it per day.
Brad has already provided good information in his reply. I just want to add that it looks to me like in this case, the sender's MUA is actually giving the list address twice (once for To: and once for Cc:) to the MTA, and the MTA is not dropping the duplicate recipient. Thus, two copies of the post are actually being sent to the list. Do the duplicates appear twice in archives and/or digests? (I think the duplicate may be dropped from the archives if the message-id is the same, but I'm not sure).
Other subscribers may not see this because their incoming MTA/MUA may drop duplicate message-ids.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
Mark Sapiro wrote:
As I mentioned in my response to Brad, I'm not even involved in the discussions where I'm getting the dupes. This would be an obvious source of duplication. I'm just another quiet recipient to the list (hehe, until now anyway) and there's no reason for me to be explicitly identified in the TO or CC.
No, only one copy of every post is in the archives and no one else is reporting dupes.
Other subscribers may not see this because their incoming MTA/MUA may drop duplicate message-ids.
As with most OSS projects there is a heavy bias away from Microsoft software, including Outlook which I use. Chances are slim that others in this OSS forum are using Outlook and thus their MUAs might be filtering away the problem. So I was suspecting my MUA. However, I do not get dupes when people in this mailman-users list CC the list but I do get some dupes from that group - obviously the same MTA/MUA tiers are involved. This is why I have been suspecting something in the list software that is different. Maybe there's a patch or addin that they've installed that corrupted this dupe-filtering code? That's what brought me here - Until now I've had no idea if this was an issue specific to that group or something that was introduced in the v2.1.5 code that you guys would know or want to know about.
Thanks again.
![](https://secure.gravatar.com/avatar/746f7519ba02fb0d815e59f305c53fa2.jpg?s=120&d=mm&r=g)
Tony G wrote:
Right, but you said when you receive duplicates, the list was addressed twice in the post, once in To: and once in Cc:. Thus, I am suggesting that the list actually receives the post twice and sends it twice and that's why you get two copies.
Does anyone receive digests to confirm or deny the presense of dups in a digest. I haven't looked at the code for this right now, but as I said, I think pipermail may drop dups from the archive, so the absence of dups in the archive is not definitive.
There may be something here with digests too, but I don't think so.
The process of your not getting a dup when I address my reply to both you and the list IS a Mailman process. You only get the direct message from me because you have requested no dups, and Mailman sees your address in the To: of my post so it doesn't send to you.
This is not the case on the other list where maybe the list receives the post twice.
I don't think it's Mailman per se, but I can't be sure without knowing what is happening. I still think it could be actually two copies of the post reaching the list, but the fact that no one else on the list admits to receiving dups makes this seem unlikely. I would like to help you get to the bottom of this if I can.
I think the next thing is to collect both copies of some duplicated posts with full headers and examine the Received: chains in each to try to determine where the duplication is occurring. If you need help with this, you can post headers from duplicated posts to this list or send them to me off list, and I will try to help.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
![](https://secure.gravatar.com/avatar/746f7519ba02fb0d815e59f305c53fa2.jpg?s=120&d=mm&r=g)
Mark Sapiro wrote:
Another thing you can do if you have access to Mailman's logs is to check the post and smtp logs to see if the entire post is being sent twice.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
Mark Sapiro wrote:
I mis-spoke. It only occurs in that one list when someone CC's the list. I would understand if it were in both TO _and_ CC. Since all lists and MUA's are different, people don't know whether to Reply or Reply-All, so it's 50/50 whether the list address will be in the TO _or_ CC, but most people know to not double up.
There may be something here with digests too, but I don't think so.
I have not asked about digests but I don't think I'll find anything there either.
Remember that I am not involved in the discussions where I get the dupes. I understand the mailman code filters possible dupes when TO = a subscription address.
I have confirmation from a single Outlook user that I get dupes when they do not. (I wish I had a larger sampling of responses over a longer period of time but I'll take what I can get.) This points to an MTA issue and not list or MUA. I am now checking in that area. Again the problem is that I only get dupes to this one address when the list is in the CC. I can't believe an MTA bug would be that specific so it might be some timing issue, a hiccup during greylisting processing, etc.
Over the last month or two I have been going over the headers myself and the headers on each copy of the mails are exactly the same: same Received path and time stamps, and same Message-ID (!!). The only pattern between what generates dupes and what does not is that the list address is in the CC of duped mails - but only on that list, not in this mailman-users list. :(
Please allow me a few days to pursue the MTA route and I'll post a note here to let you know if I find anything. Based on your comments and info from the other list I'm fairly convinced that I shouldn't be wasting any more of your collective time. But I will let you know what I find out.
Thank you kindly for your dedicated interest.
![](https://secure.gravatar.com/avatar/54359ad46cfdfe2845f8c1d0975449d0.jpg?s=120&d=mm&r=g)
On 4/30/06, Tony G <4ylyh9g02@sneakemail.com> wrote:
I haven't been following this thread too carefully, but a couple of things clicked together based on some duplicate issues I've seen with my users.
Just to recap the details as I recall them
- You are the only one seeing the duplicate e-mails
- You are using Outlook.
- Duplicate e-mails are idendical down to the header level.
- Only happens on 1 list.
- Only happens when the list is in the CC header.
If all the above are correct, check your Outlook rules. Outlook may be the cause of the duplicates.
I've spent a TON of time trying to diagnose this for one user and it turned out it was her Outlook rules that caused the duplicate.
I don't use Outlook myself, but try disabling the rule for a while and see if the duplicates still happen. If not, then recreate the rule.
I know this isn't Mailman related, but I think that this may be a good cause for the archive.
-- Bryan Carbonnell - carbonnb@gmail.com Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "What a great ride!"
![](https://secure.gravatar.com/avatar/5894ba3a62af4c7bf03ec4ff0231f164.jpg?s=120&d=mm&r=g)
I just wanted to close this old topic with a thanks to Bryan Carbonnell (and anyone else) who successfully diagnosed the issue of mail duplication as mis-configured Outlook rules rather than a problem with mailman processing CC, reply-to, etc..
Thanks to anyone who responded. I'll go flog myself once for every person who's time has been wasted here. :) Tony
Bryan Carbonnell wrote:
![](https://secure.gravatar.com/avatar/e6ea3e5ffc3558c74e9f8cbf3f38357a.jpg?s=120&d=mm&r=g)
At 5:49 PM -0700 2006-04-30, Tony G wrote:
If the headers really are completely identical, including all
queue ids and time stamps in the "Received:" headers, then the only machine that could be causing the duplication is the MTA of your mail services provider.
With a few header samples of various messages, we should be able
to figure out what's going on. Or, at least get a better idea of what additional information we may need.
-- Brad Knowles, <brad@stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
LOPSA member since December 2005. See <http://www.lopsa.org/>.
![](https://secure.gravatar.com/avatar/e3f756085bb13a7ba37646802f912792.jpg?s=120&d=mm&r=g)
On 4/30/06 1:28 AM, "Tony G" <4ylyh9g02@sneakemail.com> wrote:
I'm seeing duplicates too, reading in Microsoft Entourage (which differs greatly from Outlook). I haven't taken the time to analyze them (delete works fine). Since some of them are in threads crossposted to users and developers lists, I see four copies of those.
Two copies of a message with this Message-Id: Message-Id: <1146489146.11009.13.camel@geddy.wooz.org> Message-Id: <1146489146.11009.13.camel@geddy.wooz.org> reached me through the developers list (based on the List-xx headers)
This is the one in which Barry started out "I agree that we need a lot more data"
And two more copies came via the users list.
--John
![](https://secure.gravatar.com/avatar/e3f756085bb13a7ba37646802f912792.jpg?s=120&d=mm&r=g)
On 5/1/06 7:47 AM, "John W. Baxter" <jwblist@loricamail.com> wrote:
Tony, I think you need to review your Outlook rules.
My duplications are produced in our mail server's mail sorting process, and the key is the presence of prefixes for both -users and -developers in the Subject: lines of the problem messages.
Considering only the two copies from the Developers list, the divergence appears to be in our mail processing. The messages arrived our our world-facing machine with the same Exim Id:
Received: from smtp-vbr8.xs4all.nl ([194.109.24.28]:3979) by entiat.olympus.net with esmtp (Exim 4.42) id 1FaYCW-0006pK-O1 for jwblist@loricamail.com; Mon, 01 May 2006 06:12:33 -0700
and
Received: from smtp-vbr8.xs4all.nl ([194.109.24.28]:3979) by entiat.olympus.net with esmtp (Exim 4.42) id 1FaYCW-0006pK-O1 for jwblist@loricamail.com; Mon, 01 May 2006 06:12:33 -0700
(ie, the same).
And having looked at the server logs, I now know what is happening in my case. I have our mail processing sort list mail into IMAP folders based on--in the case of these lists--the presence of the subject prefix, and these messages have prefixes for both lists in the Subject: header.
So my copy for -users gets sorted into my folders for -users and for -developers, and my copy for -developers gets sorted into -users and into -developers.
Note: the next revision of our mail processing will allow sorting based on arbitrary headers--the List- headers for example.
participants (5)
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Brad Knowles
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Bryan Carbonnell
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John W. Baxter
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Mark Sapiro
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Tony G