After some investigation, it seems /usr/bin/mail is part of the mailutils package. So this alias expansion should be happening within /usr/bin/mail and not from postfix.
** Package changed: postfix (Ubuntu) => mailutils (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to postfix in Ubuntu. https://bugs.launchpad.net/bugs/1222181 Title: /usr/bin/mail ignores aliases in $HOME/.mailrc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mailutils/+bug/1222181/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
