Bugzilla Bug 134262

couriermlm can't deliver mailing list messages to adresses
with an equal sign in the user part.  All versions up to courier-0.53.1 are
affected.

Steps to reproduce:

* Create a test mailing list with
  couriermlm create <dir> ADDRESS=<address>
  and create the necessary .courier files

* Subscribe an address with an equal sign
  couriermlm sub <dir> foo=bar@somewhere.org
  and make sure you can receive mail with this address

* Subscribe another address without equal sign for tesing
  couriermlm sub <dir> foo-bar@somewhere.org

* Send a mail to this list

Result:

* foo-bar@somewhere.org receives the message, foo=bar@somewhere.org
  doesn't

* mailq lists the mail for foo=bar@somewhere.org

* top shows a courieresmtp process with 99% cpu usage (we also tried a
  local address with equal sign, in this case it's a courierlocal
  process)

* some minutes later the courierlocal process exits and the log shows
  err courierlocal: Error: stuck delivery, PID 1001, sending signal 15

I reported this bug to the courier-users mailing list and courier's author Sam
Varshavchik wrote a patch that fixes it.

Created an attachment (id=87439) [details]
Sam's patch

This patch from courier's author Sam Varshavchik fixes this bug.  Please add it
to all courier versions in the portage tree.

The bug is fixed in courier-0.53.2 (released yesterday).  From the release
notes:

Security: Fix a bug in Courier that, under certain circumstances, may cause a
number of processes to spin.  Backported patch for earlier versions of Courier:
http://www.courier-mta.org/beta/patches/verp-fix/

I also ran into this problem, please supply this small patch...

*** Bug 134340 has been marked as a duplicate of this bug. ***

Created an attachment (id=87494) [details]
courier-0.52.2-r1.ebuild

Created an attachment (id=87495) [details]
verp.patch

Please continue this on bug #135005

*** This bug has been marked as a duplicate of 135005 ***