[Mailman-Users] Outlook verification receipt via Mailman?

[Mark Sapiro]

Tim Tyler wrote:

>  We are running Mailman 2.1.9 on a Centos server.  I recently had a 
>request from a list owner that they would like to use the "Request a 
>delivery receipt for this message" option in Outlook to all members 
>in a particular list to verify that users have opened a 
>message.  However, mailman seems to corrupt the delivery of this 
>feature.  It works fine if she sends directly to users, but it fails 
>if sent through mailman.   I know that other pop clients also have 
>this feature and they also fail if using mailman.  Is it possible to 
>configure Mailman to allow this feature through?   If so, how might I 
>go about it?


Mailman intentionally removes 'return-receipt-to',
'disposition-notification-to', 'x-confirm-reading-to' and 'x-pmrqc'
headers from list mail. Aside from the fact that these are
non-standard, annoying and unreliable and might return to the list or
the list-bounces address rather than the poster, they could also be
used to fish for membership on a list with a private roster.

If you want to expreiment with not removing them, you need to modify
the code in Mailman/Handlers/Cleanse.py. There's no configuration
setting to do this.

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