What causes “Sender verify failed” SMTP mail error, and how to resolve it in DirectAdmin Exim servers
SMTP error from remote mail server after RCPT TO:<email@example.com>: host mx.server.com [xxx.xxx.xxx.xxx]: 550-Verification failed for <firstname.lastname@example.org> 550-No Such User Here 550 Sender verify failed
If you are a DirectAdmin web host, you would recognize this as one of the common errors reported by your customers.
Sender verify failed can be caused by issues ranging from improper file permissions to RFC non-compliance. Engineers at Bobcares help desk support services collect detailed information regarding the error through log analysis and engaging the customer.
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The following are the few of the common causes for this error. (more…)