![]() How we fix?įirstly, our Support Engineers confirm that there are no typo errors in the email address given by the customer. In such cases, the recipient server can’t route the emails. Similarly, there are instances where an email account existed on the server got removed or disabled by the customer, or it may moved to another server. In other words, a typo in the email address like extra space, dot, missing alphabet, etc. 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. Let’s now discuss the main reasons for this error and how our Support Engineers fix them. Now, we’ve a clear understanding of this error. “User unknown in virtual mailbox table” in Postfix – Causes & Fixes If the exact email delivery path of the domain can’t be found, it throws this error. In other words for the emails to work properly, the mail server must know the exact mail delivery path of a domain. ![]() This error message shows that emails are not delivered to the mailbox Because, the mail server can’t find this email account on the server. For instance, the email logs shows the error message like this: postfix/smtpd: NOQUEUE: reject: RCPT from : 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table from= to= proto=ESMTP helo= So, here our Support Experts check the Postfix email logs( /var/log/maillog) to find the origin of the problem. : Recipient address rejected: User unknown in virtual mailbox table The exact bounce message looks like this: 550. This is one of the common errors in Postifx mail servers when users send emails to their local mailboxes. “User unknown in virtual mailbox table” in Postfix – What this error means? Today, we’ll discuss the top 4 reasons for this error and how we fix them. What’s this virtual mailbox table? How can I add the user in this table? Many of these questions may arise in your mind.Īt Bobcares, we help server owners resolve such complex email errors as part of our Server Management Services. And, one such error is “user unknown in virtual mailbox table” in Postfix servers. Sometimes, emails bounce with strange errors. Everyone expects their emails to work perfectly, but that doesn’t always work.
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