Hosting Blog

User unknown in the virtual mailbox table?

There are times when you send an email and get a bounce back error message as the server tried to deliver the message but gave up on some network because the user/email account is unknown in the virtual mailbox table. For example-

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x.x.x.x does not like recipient.
Remote host said: 550 5.1.1  <mailto:[email protected]> <[email protected]>:
Recipient address rejected:
User unknown in virtual mailbox table Giving up on x.x.x.x.
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It seems like the recipient address was rejected because the user is unknown or does not exist. You can verify the recipient email account by using the online email verifier below :-

http://verify-email.org/

It helps you to find out if the mailbox to which you're sending the email actually exists or if it is created or not.