Roman Gelfand:
> 550 #5.1.0 Address rejected. (in reply to RCPT TO command)
Wietse:
> THAT is qmail not Postfix.
Roman Gelfand:
> would you have more info on this, as far as, how to go about
> researching this?
Wietse:
> Ask the person responsible for this system why they reject this
> recipient.
Roman Gelfand:
> It appears that this message is a way that the target server
> responds to email not found.
This appears to be a common "qmail patch" bug. The correct status
code for "user unknown" is 5.1.1, not 5.1.0.
Wietse
RFC 3463:
X.1.1 Bad destination mailbox address
The mailbox specified in the address does not exist. For
Internet mail names, this means the address portion to the left
of the "@" sign is invalid. This code is only useful for
permanent failures.
