What does User unknown in virtual alias table mean?
What does User unknown in virtual alias table mean?
You receive a bounce message that indicates “User unknown in virtual alias table”. This means that the server you sent the message to does not have that email address configured. If you know the email address exists, then there’s a good chance that the message was routing to the wrong server.
What does this mean recipient address rejected User unknown in virtual mailbox table?
If the recipient mail server can’t find the recipient email account, it would throw the error “User unknown in virtual mailbox table” in Postfix. In other words, a typo in the email address like extra space, dot, missing alphabet, etc. can lead to this error. In such cases, the recipient server can’t route the emails.
How to fix user unknown in virtual mailbox table?
The exact bounce message looks like this: [postfix]550 ..: Recipient address rejected: User unknown in virtual mailbox table So, here our Support Experts check the Postfix email logs ( /var/log/maillog) to find the origin of the problem. For instance, the email logs shows the error message like this:
What should I do if my recipient email address is rejected?
If any issues noted in the MX records for the recipient domain, contact the support for the server and get it sorted out. If the recipient server is yours, edit the DNS records and fix the issues. In addition to the MX records, email routing within the server should also be checked.
Why do I get an error when I send an email with an incorrect address?
Many often, the error is caused by a very simple reason – incorrect email address given in the email. Sometimes a typo in the address can often lead to emails bouncing. If the email is addressed to a non-existing account or account that is no longer in use in the recipient server, the recipient server would be unable to find the email account.
Can a mail server reject a non verifiable sender?
Many mail servers such as Postfix and Exchange have features to reject non-verifiable senders. Verifying senders can include checking SPF records to RDNS. If the sender domain is in blacklist such as Spamhaus, the recipient mail server may reject mails from the server.
