Problems sending to addresses containing a period

[dwill]

Whenever we send e-mail to addresses containing a period we are getting system undeliverable messages.

Example:
user.name@mydomain.com - fails
vs.
username@mydomain.com - OK

Any ideas?

[Klug]

I have no problem with such addresses.

What exact error message are you getting ?
How do you send the mails (webclient, ZCO, other way) ?

[phoenix]

Whenever we send e-mail to addresses containing a period we are getting system undeliverable messages.

Example:
user.name@mydomain.com - fails
vs.
username@mydomain.com - OK

Any ideas?

Have a look at the details in this post.

[dwill]

Outlook with IMAP or Connector - Have seen the problem in both configurations.

The error is a Failed delivery message returne to the client, almost instantly. It has happened with a few different users sending to unrelated domains. The only common thread is the a.b@domain address format that causes the failure.

[Klug]

As Bill suggested, I guess you have a postfix setup issue...

[dwill]

Networks added. thanks for the nudge.