I'm working on replacing an ageing Posfix install with a new server. On the old and new server we use virtual domains.
On the old server we login with: username.domain.com On the new server Postfix is configured to allow login as: usern...@domain.com I'd actually rather prefer the new format, however, for ease of transition is there a way I can configure Postfix to allow the . and even better yet, to allow either?