The server guide has a warning about this package being deprecated (paride just added it):
https://ubuntu.com/server/docs/mail-postfix """ Deprecation warning: please note that the mail-stack-delivery metapackage has been deprecated in Focal. The package still exists for compatibility reasons, but won’t setup a working email system. """ A search doesn't turn mail-stack-delivery up anywhere else, so I'm marking that task as released. ** Changed in: serverguide Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1876564 Title: mail-stack-delivery has missing packages on focal To manage notifications about this bug go to: https://bugs.launchpad.net/serverguide/+bug/1876564/+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