Public bug reported: Hi, the following test case resulted in: HTTP/1.0 500 Internal Server Error Username: MyTest e-mail: MyTest@domain.invalid 1. Create user curl -v -H "Accept: application/json" -H "Content-type: application/x-www-form-urlencoded" -X POST -d 'email=MyTest@domain.invalid&display_name=MyTest@domain.invalid' http://localhost:8001/3.0/users -> 201 Created DB address contains email "mytest@domain.invalid" and _original "MyTest@domain.invalid" curl -v -H "Accept: application/json" -H "Content-type: application/x -www-form-urlencoded" -X POST -d 'list_id=some_list.domain.invalid&role=member&subscriber=MyTest@domain.invalid' http://localhost:8001/3.0/members -> 500 Internal Server Error No log file contain any exception or error message Workaround available: Using lower-case letters result in a success curl -v -H "Accept: application/json" -H "Content-type: application/x-www-form-urlencoded" -X POST -d 'list_id=some_list.domain.invalid&role=member&subscriber=mymest@domain.invalid' http://localhost:8001/3.0/members ** 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/1332922 Title: Mailman 3.0 REST API does not support e-mails with uppercase letters To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1332922/+subscriptions