Fwd: Bounce action notification
Today suddenly all my member emails bounced as you see a sample below. What happened and how can I fix it?
-------- Forwarded Message -------- Subject: Bounce action notification Date: Mon, 22 Mar 2021 03:05:15 -0400 From: mailman@groupartin.com To: 24april-owner@groupartin.com
This is a Mailman mailing list bounce action notice:
List: 24April Member: artin1@rogers.com Action: Subscription bounce score incremented. Reason: Excessive or fatal bounces.
The triggering bounce notice is attached below.
Questions? Contact the Mailman site administrator at mailman@groupartin.com.
This is the mail system at host relay.mailchannels.net.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system<zavenian@msn.com>: lost connection with msn-com.olc.protection.outlook.com[104.47.59.161] while receiving the initial server greeting
Vako Nicolian writes:
Today suddenly all my member emails bounced as you see a sample below. What happened and how can I fix it?
This seems very unlikely to be a mailman problem at all.
If for some reason somebody tries to blame it on Mailman and you want more help, please be more precise about "all my member emails". What we see here is *one* post that bounced for a list of *several* email addresses. I don't want to guess whether you mean *all* posts are bouncing to *everyone* or that it's a subset of posts or a subset of addresses that are bouncing -- there are various mechanisms that could cause the problem, and the exact set of mails that are bouncing will help to distinguish them.
This is the mail system at host relay.mailchannels.net.
You expect mailchannels.net to be handling your outgoing mail, is that correct?
[snip]
<zavenian@msn.com>: lost connection with msn-com.olc.protection.outlook.com[104.47.59.161] while receiving the initial server greeting
This is from the MTA at mailchannels, so I can't be 100% sure, but it looks like the remotes are rejecting your mail as soon as relay.mailchannels.net tries to connect, and they don't actually talk to relay at all. The remotes have definitely not seen your mail, so it cannot be a DKIM, DMARC, or content filtering problem, and if "initial server greeting" means what I think it does, it hasn't seen HELO yet so it's not SPF either.
The problem with this email is a mailchannels problem. If others are bouncing in different ways, it might be something else, even Mailman.
Steve
I forwarded only one of the bounces, check the list on this link: https://www.dropbox.com/s/auuylwltwjpvqxo/MM2.jpg?dl=0 <https://www.dropbox.com/s/auuylwltwjpvqxo/MM2.jpg?dl=0> The attachment mentions the following and it's different for each bounce. Mainly *Lost connection while receiving the initial server greeting*. I have never encountered such bounces with my regular email, that's why I was pointing to MM, but I maybe wrong.
<###@videotron.ca>: lost connection with mx.videotron.ca[24.201.245.37] while receiving the initial server greeting
<###@videotron.ca>: lost connection with mx.videotron.ca[24.201.245.37] while receiving the initial server greeting
<###@videotron.ca>: lost connection with mx.videotron.ca[24.201.245.37] while receiving the initial server greeting
<###@msn.com>: lost connection with msn-com.olc.protection.outlook.com[104.47.59.161] while receiving the initial server greeting
<###@rogers.com>: lost connection with mx-rogers.mail.am0.yahoodns.net[67.195.228.74] while receiving the initial server greeting
Stephen J. Turnbull wrote on 3/22/2021 11:35 AM:
Vako Nicolian writes:
Today suddenly all my member emails bounced as you see a sample below. What happened and how can I fix it?
This seems very unlikely to be a mailman problem at all.
If for some reason somebody tries to blame it on Mailman and you want more help, please be more precise about "all my member emails". What we see here is *one* post that bounced for a list of *several* email addresses. I don't want to guess whether you mean *all* posts are bouncing to *everyone* or that it's a subset of posts or a subset of addresses that are bouncing -- there are various mechanisms that could cause the problem, and the exact set of mails that are bouncing will help to distinguish them.
This is the mail system at host relay.mailchannels.net.
You expect mailchannels.net to be handling your outgoing mail, is that correct?
[snip]
<zavenian@msn.com>: lost connection with msn-com.olc.protection.outlook.com[104.47.59.161] while receiving the initial server greeting
This is from the MTA at mailchannels, so I can't be 100% sure, but it looks like the remotes are rejecting your mail as soon as relay.mailchannels.net tries to connect, and they don't actually talk to relay at all. The remotes have definitely not seen your mail, so it cannot be a DKIM, DMARC, or content filtering problem, and if "initial server greeting" means what I think it does, it hasn't seen HELO yet so it's not SPF either.
The problem with this email is a mailchannels problem. If others are bouncing in different ways, it might be something else, even Mailman.
Steve
Mailman-Users mailing list -- mailman-users@python.org To unsubscribe send an email to mailman-users-leave@python.org https://mail.python.org/mailman3/lists/mailman-users.python.org/ Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: https://www.mail-archive.com/mailman-users@python.org/ https://mail.python.org/archives/list/mailman-users@python.org/
Vako Nicolian writes:
I forwarded only one of the bounces, check the list on this link:
I'm a volunteer with limited time. I analyze what you summarize.
Mainly *Lost connection while receiving the initial server greeting*.
I have zero interest in those. Nothing Mailman can do can affect that. It's a mailchannels problem, not a problem with the mail being sent or the sender. Unless that message means something completely inconsistent with the normal, RFC 5321 usage of "initial server greeting", it means that the only thing that the remote host knows is the IP of relay.mailchannels.net. It hasn't even seen HELO yet, so even SPF doesn't apply.
My first guess is that mailchannels got itself on a commonly-used RBL, or they screwed up their DNS.
I have never encountered such bounces with my regular email, that's why I was pointing to MM, but I maybe wrong.
That's reasonable first-cut analysis, but I assure you, unless mailchannels is completely confused about "initial server greeting," Mailman has absolutely nothing to do with it.
Steve
On 3/22/21 10:11 PM, Vako Nicolian wrote:
I forwarded only one of the bounces, check the list on this link: https://www.dropbox.com/s/auuylwltwjpvqxo/MM2.jpg?dl=0
Which says nothing except there are lots of bounces.
The attachment mentions the following and it's different for each bounce. Mainly *Lost connection while receiving the initial server greeting*.
This is an issue between the sending MTA and the recipient MTAs. It almost certainly has nothing to do with Mailman. Mailman has delivered the message to the outgoing MTA and it or some downstream MTA is encountering this issue when attempting to deliver to the recipients.
You need to talk to whoever is responsible for that MTA. If that is you, you need to get help from whoever supports that MTA software.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
participants (3)
-
Mark Sapiro -
Stephen J. Turnbull -
Vako Nicolian