Re: [Mailman-Users] Need help with content filtering
On Mar 5, 2005, at 12:46 PM, Mark Sapiro wrote: I think what's going on here is the original message is multipart/alternative with both a text/plain part and a text/html part. If more than one sub-part remains in a multipart/alternative part after filtering, Mailman selects the first remaining alternative which would be the text/plain part in this case. This was a problem with my users until I discovered that Outlook seems to send the text part first, but other mail clients sent the html part first, so html was getting through only for people who didn't use Outlook. But I don't see the point of removing all but one alternative part. Why does Mailman do that? - Stoney -- Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=showamp;file=faq01.027.htp
Re: [Mailman-Users] Need help with content filtering
Stonewall Ballard wrote: On Mar 5, 2005, at 12:46 PM, Mark Sapiro wrote: I think what's going on here is the original message is multipart/alternative with both a text/plain part and a text/html part. If more than one sub-part remains in a multipart/alternative part after filtering, Mailman selects the first remaining alternative which would be the text/plain part in this case. This was a problem with my users until I discovered that Outlook seems to send the text part first, but other mail clients sent the html part first, so html was getting through only for people who didn't use Outlook. This would appear to be a violation of RFC 2046 section 5.1.4 which says in part ... the alternatives appear in an order of increasing faithfulness to the original content. But I don't see the point of removing all but one alternative part. Why does Mailman do that? To reduce the size of the outgoing message. This can be a significant reduction. Also, to support the idea that posts received from mailing lists should be intelligible to the maximum number of recipients, some of whom may by choice or necessity not use MIME aware MUAs. -- Mark Sapiro [EMAIL PROTECTED] The highway is for gamblers, San Francisco Bay Area, Californiabetter use your sense - B. Dylan -- Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=showamp;file=faq01.027.htp
Re: [Mailman-Users] Need help with content filtering
Thanks, Mark. I decided to create a test mailing list to experiment with content filtering. Incidentally, this is Mailman v2.1.5. Edit filter content: YES Filter mime types: (blank) Pass mime types: multipart/mixed multipart/alternative text/plain text/html Convert HTML to plaintext: (see below) Filter action: Forward to list owner I created a simple two-line HTML page in Word and pasted it in to Outlook (set to send HTML) but without stationery. It didn't matter whether Convert HTML to plain text was YES or NO: In both cases, all HTML font formatting was stripped out. However the link I had in the original was preserved. I'd be happy to email the simple test page to anyone off list. This is really confusing me! - If my HTML page has an image in it (stationery), it will be treated as an attachment. Won't Mailman remove it because it doesn't have an approved content type? It doesn't. Instead it blocks the message and sends me this: The attached message matched the XXX mailing list's content filtering rules and was prevented from being forwarded on to the list membership. You are receiving the only remaining copy of the discarded message. When I send the same page without the image, the message is acceptable. Thanks. -- Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=showamp;file=faq01.027.htp
Re: [Mailman-Users] Need help with content filtering
Pete Holsberg wrote: I decided to create a test mailing list to experiment with content filtering. Incidentally, this is Mailman v2.1.5. Edit filter content: YES Filter mime types: (blank) Pass mime types: multipart/mixed multipart/alternative text/plain text/html Convert HTML to plaintext: (see below) Filter action: Forward to list owner I created a simple two-line HTML page in Word and pasted it in to Outlook (set to send HTML) but without stationery. It didn't matter whether Convert HTML to plain text was YES or NO: In both cases, all HTML font formatting was stripped out. However the link I had in the original was preserved. I think what's going on here is the original message is multipart/alternative with both a text/plain part and a text/html part. If more than one sub-part remains in a multipart/alternative part after filtering, Mailman selects the first remaining alternative which would be the text/plain part in this case. There are two ways to get the HTML part to the list in this case. One is to not allow text/plain at all. This is probably a very bad idea for a discussion list, but might be viable for an announcement list where the intent is to always post HTML. The other is to set up your MUA (Outlook) to send HTML only, not multipart/alternative. I'd be happy to email the simple test page to anyone off list. This is really confusing me! - If my HTML page has an image in it (stationery), it will be treated as an attachment. Won't Mailman remove it because it doesn't have an approved content type? It doesn't. Instead it blocks the message and sends me this: The attached message matched the XXX mailing list's content filtering rules and was prevented from being forwarded on to the list membership. You are receiving the only remaining copy of the discarded message. When I send the same page without the image, the message is acceptable. What this means is content filtering removed the entire message. This may be a problem with content filtering or it may be the way Outlook structures this message. I can't say without seeing such a message as received by Mailman. If you want to Cc: me directly with one of these test posts, I'll look at it and tell you what I think. -- Mark Sapiro [EMAIL PROTECTED] The highway is for gamblers, San Francisco Bay Area, Californiabetter use your sense - B. Dylan -- Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=showamp;file=faq01.027.htp
[Mailman-Users] Need help with content filtering
I would like for members of the list I run to be able to
send HTML-encoded emails and any attachments except pictures.
Remove message attachments that have a matching content
type contains:
image
Remove message attachments that don't have a matching
content type contains:
multipart/mixed
multipart/alternative
text/plain
text/html
Should Mailman convert text/html parts to plain text? is NO
As a test I copied an HTML file that was open in Word (it
contained a single line), pasted it into Outlook (set for
HTML) and sent it to my list. I got the following repsonse:
The attached message matched the
4sam-4seasonsatmapleton.org mailing
list's content filtering rules and was prevented from being
forwarded
on to the list membership. You are receiving the only
remaining copy
of the discarded message.
One of the attachments contained this:
BODY { MARGIN-TOP: 25px; FONT-SIZE: 10pt; MARGIN-LEFT: 25px;
COLOR: #00; FONT-FAMILY:
Arial, Helvetica } P.msoNormal { MARGIN-TOP: 0px; FONT-SIZE:
10pt; MARGIN-LEFT: 0px;
COLOR: #cc; FONT-FAMILY: Helvetica, Times New Roman }
LI.msoNormal { MARGIN-TOP:
0px; FONT-SIZE: 10pt; MARGIN-LEFT: 0px; COLOR: #cc;
FONT-FAMILY: Helvetica, Times New
Roman }
Sunday, April 10, 2005
What am I doing wrong?
Thanks.
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