hoZt wrote:

I am migrating from a cpanel server that has usernames in the format "user+domain.com". On the new server I am using the format "user.domain.com" and it all works perfectly with dovecot / postfix. Is there any way that I can allow users to login either with the "." or "+" delimiter? Thanks in advance for any suggestions!

Since the plus sign is used as the default delimeter for 'plus-addressing', it should just work - but means you'd have to specify a different character to use for plus addressing.

The normal way to do virtual domains is to simply use the full email address.