Ankush Sharma has proposed merging lp:~black-perl/mailman/fix-mailman into lp:mailman. Requested reviews: Mailman Coders (mailman-coders) Related bugs: Bug #1425359 in GNU Mailman: "500 error code shown by postorius instead of 409 error code" https://bugs.launchpad.net/mailman/+bug/1425359 For more details, see: https://code.launchpad.net/~black-perl/mailman/fix-mailman/+merge/251709 Discussed here https://mail.python.org/pipermail/mailman-developers/2015-March/024474.html about the bug and its fix. Added test to call mailman REST api using case sensitive email address in 'test_try_to_join_a_list_twice' method. -- Your team Mailman Coders is requested to review the proposed merge of lp:~black-perl/mailman/fix-mailman into lp:mailman.