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What causes “Sender verify failed” SMTP mail error, and how to resolve it in ZPanel Postfix servers

by Visakh S | Oct 25, 2014 | Technical Support

SMTP error from remote mail server after RCPT TO:<user2@domain2.com>: host mx.server.com [xxx.xxx.xxx.xxx]: 550-Verification failed for <user1@domain1.com> 550-The mail server could not deliver mail to user1@domain1.com. The account ordomain may not exist,...

What causes “Sender verify failed” SMTP mail error, and how to resolve it in Webmin/Virtualmin Postfix servers

by Visakh S | Oct 25, 2014 | Technical Support

SMTP error from remote mail server after RCPT TO:<user2@domain2.com>: host mx.server.com [xxx.xxx.xxx.xxx]: 550-Verification failed for <user1@domain1.com> 550-The mail server could not deliver mail to user1@domain1.com. The account ordomain may not exist,...

What causes “Sender verify failed” SMTP mail error, and how to resolve it in Parallels Plesk Postfix servers

by Visakh S | Oct 25, 2014 | Plesk, Technical Support

SMTP error from remote mail server after RCPT TO:<user2@domain2.com>: host mx.server.com [xxx.xxx.xxx.xxx]: 550-Verification failed for <user1@domain1.com> 550-The mail server could not deliver mail to user1@domain1.com. The account ordomain may not exist,...

What causes “Sender verify failed” SMTP mail error, and how to resolve it in DirectAdmin Exim servers

by Visakh S | Oct 25, 2014 | DirectAdmin, Technical Support

SMTP error from remote mail server after RCPT TO:<user2@domain2.com>: host mx.server.com [xxx.xxx.xxx.xxx]: 550-Verification failed for <user1@domain1.com> 550-No Such User Here 550 Sender verify failed If you are a DirectAdmin web host, you would...

Protecting your DirectAdmin server from SSLv3 POODLE vulnerability

by Visakh S | Oct 17, 2014 | Apache, DirectAdmin, FTP, Nginx, Server Administration

UPDATE 17th Oct – Some browsers like Firefox and IE 6 are reporting issues when SSLv3 is disabled. Fortunately, SSLv3 fix is available from OpenSSL, and major distros would soon be putting it to their repos. SSLv3 disabling can soon be done in a phased manner....
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