i am able to log into webmail and send mail from a specific email address but when trying to reply to that email address i get an error:
This is the Postfix program at host randymail-mx3.g.dreamhost.com.
I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The Postfix program
firstname.lastname@example.org (expanded from
email@example.com): unknown user: "m9582267"
Final-Recipient: rfc822; firstname.lastname@example.org
Original-Recipient: rfc822; email@example.com
Diagnostic-Code: X-Postfix; unknown user: "m9582267"