5.1.1 : Recipient address rejected: User unknown in virtual mailbox table When you see an error similar to the one above, this may be because you are trying to send an email to a domain on your server but that uses an external mail service. What happens is Plesk will Continue Reading
5.1.1 Recipient address rejected: User unknown in virtual mailbox…
- in Blog Posts
- by Alex Yau
- February 22, 2019
- Comments Off on 5.1.1 Recipient address rejected: User unknown in virtual mailbox…