The recipient mail server instead of its intended server.Ĭases, recipient mail server cannot find the account and will bounce the Instance, the MX records for the domain could be wrongly resolving to Not correct or the MX entry is not resolving correctly. Incorrect DNS settings for the domainĥ50 can also occur when the DNS settings for the recipient domain are
Whether the email account actually exists. If everything is fine at your end, confirm Validate the recipient email address you’ve given in the email for any If the recipient doesn’t have the email address that you’re sending to, it will bounce the mail with the error message ‘ 550 5.1.1 User unknown‘. Server can cause the email account to get disabled and mails to that In such cases, the recipient server would be unable to deliverĮven a misconfiguration or bug in the recipient mail A missing alphabet or an incorrect character canĪddress that once existed, gets deleted or moved from the recipient mail Times, a typo in the email address of the recipient can cause thisĮmail delivery failure. Sender would get the bounce message ‘550 5.1.1 User unknown‘, if the recipient mail server is unable to find the recipient mail account in it.
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Today we’ll see the major causes of this email error and how to fix them. to Exchange servers, seeing thisĥ50 5.1.1 User unknown (in reply to RCPT TO command) Web hosting companies, we’ve seen senders sending mails from other In our role as Website Support specialists for Recipient server which makes it unable to deliver the mail.
To Exchange servers. 550 error means there is some problem with the One of the common issues reported by users sending mails