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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:<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
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. Check...
Protecting your Parallels Plesk server from SSLv3 POODLE vulnerability
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. Check...
Protecting your cPanel/WHM server from SSLv3 POODLE vulnerability
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. Check...
How to resolve “550 Access denied – Invalid HELO name” error from Outlook (0x800ccc78), Windows Mail, etc in ZPanel Postfix mail servers
The mail user reports the error: Task user@domain.com – Sending reported error (0x800CCC78): ‘Cannot send the message. Verify the email address in your account properties. The server responded: 550 Access denied – Invalid HELO name (See RFC2821 4.1.1.1) Corresponding...
How to resolve “550 Access denied Virtualmin/Webmin Postfix mail servers
The mail user reports the error: Task user@domain.com – Sending reported error (0x800CCC78): ‘Cannot send the message. Verify the email address in your account properties. The server responded: 550 Access denied – Invalid HELO name (See RFC2821 4.1.1.1) Corresponding...
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