User's emails being rejected for "content type not explicitly allowed"
I've got one user whose emails always get bounced back with the message "The message's content type was not explicitly allowed'.
There are no attachments or images in the rejected emails that I can see. Where do I start looking to find out what it's objecting to? Note that we've just moved this list to a new list server, so it's likely to be something we've set wrongly on the new server.
There's a dkim-signature header in it. Could that be doing it?
I'm not an admin, so I don't have access to any of the list settings. What settings should I ask the admin for to help diagnose it?
Peter Shute
Sent from my iPad
I was looking at the message attached to the user's rejection email, but now that I look at the one attached to the moderator alert email, I can see that there's an html signature that appears to have been treated as a separate attachment of content-type application/unknown. What's the best way to deal with those?
Peter Shute
From: Mailman-Users [mailman-users-bounces+pshute=nuw.org.au@python.org] On Behalf Of Peter Shute [pshute@nuw.org.au] Sent: Thursday, 9 January 2014 3:42 PM To: mailman-users@python.org Subject: [Mailman-Users] User's emails being rejected for "content type not explicitly allowed"
I've got one user whose emails always get bounced back with the message "The message's content type was not explicitly allowed'.
There are no attachments or images in the rejected emails that I can see. Where do I start looking to find out what it's objecting to? Note that we've just moved this list to a new list server, so it's likely to be something we've set wrongly on the new server.
There's a dkim-signature header in it. Could that be doing it?
I'm not an admin, so I don't have access to any of the list settings. What settings should I ask the admin for to help diagnose it?
Peter Shute
Sent from my iPad
Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/pshute%40nuw.org.au
On 01/08/2014 09:13 PM, Peter Shute wrote:
I was looking at the message attached to the user's rejection email, but now that I look at the one attached to the moderator alert email, I can see that there's an html signature that appears to have been treated as a separate attachment of content-type application/unknown. What's the best way to deal with those?
That's not it.
Look at the list's content filtering options. What is happening is that pass_mime_types is not empty and does not contain the content-type of the message and filter_action is reject.
This most often happens when the content-type is text/html and that is not allowed, but it can also happen for example it the message's content-type is say multipart/related, and pass_mime_types contains multipart/mixed and multipart/alternative but not multipart and not multipart/related.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
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Peter Shute