I am not able to send email to some recipients. receiving "User unknown in virtual mailbox table"
Problem reported by Stresss - 6/16/2019 at 11:10 PM
I am not able to send email to some recipients. Receiving error: 
Remote Server returned: '550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table'

but i can send email to the same recipient from gmail without any problems, maybe someone faced this issue before?

Thanks in advance.


2 Replies

Reply to Thread
Sébastien Riccio Replied
This message looks an answer of the remote SMTP server. You should search for the outgoing SMTP session in the delivery logs, to check which remote SMTP server is answerd this, and double check if it's the correct MX for the domain you are trying to send to.

Maybe a DNS cache issue and you got the wrong mx entry ?

Sébastien Riccio
System & Network Admin

Jade D Replied
Hi Greg,

That error is a remote error and not a smartermail error.
Ideally the remote mail administrator needs to resolve that issue.

Reply to Thread