On 05/30/2014 10:35 AM, Murray S. Kucherawy wrote:

What's the expertise on the idea of adding footers in a new MIME text/plain part rather than just bolting it onto the text as-is? (Or is that already done?) What do MUAs generally do with multipart text/plain bodies?

This is what Mailman currently does with msg_header and msg_footer in all cases *except* the common one where the message after content filtering is a single-part text/plain message with known character set.

Mailman could easily do this in all cases, but there would be many complaints due to common MUAs that don't display this well.

MUA's deal with this differently. Some are quite reasonable and just display all the parts inline in the sequence in which they appear, although they may also indicate that there are 'attachments'.

Others display only the 'body' and one is required to open or download and open the attached footer.

Really pathological ones, including IIRC MS Outlook will in cases where a msg_header part is added, display the msg_header part as the text of the message with the original body and footer as attachments requiring additional user action to see.

Also, it is not clear what the legal situation would be in jurisdictions that require an unsubscribe link in list mail. Is a link in a separate MIME part that may not be displayed inline by some MUAs satisfaction of that requirement.

-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan