This message was posted a couple of days ago and never got a response. I am curious about the answer as well. I am working on switching to courier from an NT-based mail server. Quite a few of our existing email addresses have underscores in them. For my tests I have had to create a new email address and make the original address (with the underscore) an alias. Although this works, it would be simpler and less messy to be able to add them directly to userdb.

So is there a reason for it? Any way around it other than creating aliases as I described?

Bowie