[ mailman-Bugs-1956393 ] List Options change of address accepts mailto:

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Fri May 2 23:37:40 CEST 2008

Bugs item #1956393, was opened at 2008-05-02 12:16
Message generated for change (Settings changed) made by msapiro
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Category: (un)subscribing
Group: 2.1 (stable)
Status: Open
>Resolution: Accepted
Priority: 5
Private: No
Submitted By: niall shaw (sgpostie)
>Assigned to: Mark Sapiro (msapiro)
Summary: List Options change of address accepts mailto: 

Initial Comment:
One of my users changed their subscription address by copying and pasting in List Options, and accidentally included the mailto: protocol.  While they received messages at their new address, they were not recognised as subscribers when attempting to send.

Testing this, I find that the Mass Subscription page strips mailto: and subscribes the proper address.

**The normal deletion tools fail to operate on the invalid address**:
  Membership list unsub checkbox;
  Mass Removal page;
  Command Line remove_members
- all fail to remove an address with mailto:

remove_members produces the following error for the example address mailto:testaddress at server:

Traceback (most recent call last):
  File "/usr/sbin/remove_members", line 186, in ?
  File "/usr/sbin/remove_members", line 176, in main
    admin_notif, userack)
  File "/usr/lib/mailman/Mailman/MailList.py", line 1014, in ApprovedDeleteMember
  File "/usr/lib/mailman/Mailman/OldStyleMemberships.py", line 220, in removeMember
  File "/usr/lib/mailman/Mailman/OldStyleMemberships.py", line 113, in __assertIsMember
    raise Errors.NotAMemberError, member
Mailman.Errors.NotAMemberError: testaddress at server

- indicating (I think) that the search function fails because it doesn't include mailto: as part of the address.

There *is* a workaround: clone_member -r will delete the invalid address. (Using clone_member without -r successfully creates a new valid subscription, e.g. testaddress at server - but this then will be deleted by any of the above tools rather than "mailto:testaddress at server"!)

However, the main problem here is that mailto: is accepted by the List Options page change of address mechanism.  Hopefully it would not be too hard to adapt the filtering used on the Mass Subscription page?


>Comment By: Mark Sapiro (msapiro)
Date: 2008-05-02 14:37

Logged In: YES 
Originator: NO

Wow, is this a can of worms.

Actually, mailto:user at example.com should be a valid email address although
it should be quoted as "mailto:user"@example.com because it contains a

However, as you have observed, there are multiple problems with this in

Note that in addition to your clone_member workaround, the withlist method
described at
<http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq03.013.htp> will
also work to remove the address.

Most of the command line tools don't work, because they use the Python
email.Utils.parseaddr() function to parse the input into real name and
address, and this returns various things depending on exactly how the
address is presented. E.g. email.Utils.parseaddr('mailto:user at example.com')
returns 'user at example.com' which is why mass subscribe "works", but
email.Utils.parseaddr('<mailto:user at example.com>') returns 'mailto'.

Also, MTAs get involved. In my test with Postfix, Mailman sent the
confirmation to mailto:user at example.com with an envelope from
list-bounces+mailto:user=example.com at example.net, and Postfix changed these
to user at example.com and user=example.com at example.net respectively. If it
weren't for this, the confirmation couldn't be received in the first place
and the change couldn't be confirmed.

Anyway, it needs to be fixed. Since there should not be any colon (or
several other characters) in unquoted local parts, I'll check explicitly
for that in Mailman.Utils.ValidateEmail(), which is used everywhere to
validate email addresses.


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