What does recipient address rejected User unknown in virtual mailbox table mean?
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.
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What does Recipient address rejected User unknown mean?
It is an error code that usually stands for some issue with the recipient server. The most frequent error message is “ User unknown ”. In most cases, this is because the recipient address does not exist. But there are other possible reasons and other possible error messages.
What does User unknown mean?
Unknown users are invalid or unrecognized email addresses in a sender’s database. When you deploy an email to an email address that does not exist, a 5xx 5. x.x error message will appear in your Simple Mail Transfer Protocol (SMTP) bounce logs with a description such as: Unknown user.
What does User unknown in virtual alias table mean?
Problem Description After sending a message, 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.
What is a virtual alias table?
Normally, the virtual(5) alias table is specified as a text file that serves as input to the postmap(1) command. The result, an indexed file in dbm or db format, is used for fast searching by the mail system.
How do I fix 550 5.4 1 Recipient address rejected Access denied?
In the Microsoft 365 admin center, click Admin > Exchange. Click Mail flow > Accepted domains….Domain configuration issues
- Open the Microsoft 365 admin center.
- Click Domains and verify your domain appears in the list as Active.
- Select the domain and click Troubleshoot. Follow the troubleshooting wizard steps.
Why is my email address rejected?
When you send an email and get an “address rejected” error message, it means the email server can’t verify your email address because the SMTP server authentication feature is disabled in your email client. Enable the SMTP server authentication feature in your email client.
What does user unknown in virtual alias table mean?
What does user unknown mean in an email?
1 User unknown’ is one of the common issues reported by users sending mails to Exchange servers. 550 error means there is some problem with the recipient server which makes it unable to deliver the mail.
Why does my email keep getting rejected by server?
Why is server rejected recipients address?
The recipient (email address) was rejected by the server because it does not allow relaying”. This need not mean you are sending to an incorrect recipient address. If the mail server feels you are trying to relay through it without proper authentication, this error pops up.
What does recipient email server rejected the message?
When you send an email and get an “address rejected” error message, it means the email server can’t verify your email address because the SMTP server authentication feature is disabled in your email client.
What does recipient rejected mean?
1 error code in Email non-delivery reports in Exchange Online it suggests: “The mail server that’s generating the error doesn’t accept mail for the recipient’s domain. This error is generally caused by mail server or DNS misconfiguration.” To put it simply, the issue is on the recipient end and no on your end.