[Bug 1216960] [NEW] Address removed from CC-list

[Tom de Vries]

Public bug reported:

I've run into the following behavior of mailman:

I sent an email and CC-ed somebody at bla1.com, who also is a member of mailing
list ml at bla2.com, which I also CC-ed:
...
CC: somebody at bla1.com, ml at bla2.com
...

When looking at the copy I got from the mailing list (I'm also a member), the
email appeared as:
...
CC: ml at bla2.com
...

I saw this and thought I forgot to explicitly CC somebody at bla1.com, and had to
go back to my sent box to find that I did indeed explicitly CC that address.

So mailman is losing information when forwarding the email, and in my view this
is a bug.

The behavior is coupled to the member.receive_list_copy property (Subscription
Option 'Avoid duplicate copies of messages?'), but I don't see why not sending a
copy should mean removal from the CC-line in other copies.

I suspect the behavior is due to the last 2 lines in this snippet from
src/mailman/handlers/avoid_duplicates.py:
...
                if send_duplicate:
                    msgdata.setdefault('add-dup-header', set()).add(r)
                    newrecips.add(r)
                elif r in cc_addresses:
                    del cc_addresses[r]
...

** Affects: mailman
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Mailman
Coders, which is subscribed to GNU Mailman.
https://bugs.launchpad.net/bugs/1216960

Title:
  Address removed from CC-list

To manage notifications about this bug go to:
https://bugs.launchpad.net/mailman/+bug/1216960/+subscriptions