I've added a new address as a reply address for a user that's acting strange, here's what's happening: let's say her main address is email@example.com, but hsmith's reply address is firstname.lastname@example.org. Hjones emails email@example.com, then firstname.lastname@example.org replies back -- to email@example.com -- but the reply bounces back to jsmith because reply address is coming up as firstname.lastname@example.org
(the "www." is being added to the reply address). Here's what the bounce message looks like:
> Your e-mail is being returned to you because there was a problem with its
> delivery. The address which was undeliverable is listed in the section
> labeled: "----- The following addresses had permanent fatal errors -----".
> The reason your mail is being returned to you is listed in the section
> labeled: "----- Transcript of Session Follows -----".
> The line beginning with "<<<" describes the specific reason your e-mail
> not be delivered. The next line contains a second error message which is
> general translation for other e-mail servers.
> Please direct further questions regarding this message to the e-mail
> administrator or Postmaster at that destination.
> --AOL Postmaster
> ----- The following addresses had permanent fatal errors -----
> ----- Transcript of session follows -----
>... Deferred: Connection refused by
> Message could not be delivered for 3 hours
> Message will be deleted from queue