Whats the deal with @ in mailbox usernames?
It’s a bad idea, according to Wietse Venema in this post on the Postfix mailing list: http://archives.neohapsis.com/archives/postfix/2000-02/0892.html Virtualmin has several clever hacks to workaround this particular feature of Postfix, revolving around the creation of a second user with the same UID and paths, which Postfix can deliver to. This has many potential problems and might confuse other software that isn’t smart enough to deal with multiple usernames with the same UID (this is perfectly legitimate, and ought to work, but it is a common failing and even some of our stuff has had some bugs uncovered, but now fixed, by this hack). On recent operating systems (Fedora Core 5+, CentOS 5, Debian 4.0+, and Ubuntu 8.04LTS are all confirmed to have this issue) the Cyrus saslauthd version defaults to dropping the “@domain.tld” portion of the username before attempting authentication. This, obviously, won’t work. The solution is to add the “-r” flag to the saslauthd command. On Red Hat b
