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How to fix email error ‘403 4.7.0 TLS handshake failed’ in cPanel, Plesk, Exim, Qmail, Exchange and SendMail servers

by Reeshma Mathews | Sep 6, 2016 | cPanel, Plesk, Sendmail, Server Management, Technical Support

Debugging and fixing email errors is a common task we perform in our Outsourced Web Hosting Support services provided to shared server owners. Among the common mail server errors, ‘403 4.7.0 TLS handshake failed’ error happens when a sender tries to send...

How to fix error ‘421 Too many concurrent SMTP connections’ in cPanel and DirectAdmin servers

by Reeshma Mathews | Aug 31, 2016 | cPanel, DirectAdmin

Managing and troubleshooting mail servers forms a vital part of the Outsourced Website Support services we provide to shared server owners. Among the common mail server errors, 421 is a common one that happens due to ‘too many concurrent SMTP connections’....

Disable RC4 ciphers in cPanel/WHM servers – Why and How to do it?

by Reeshma Mathews | Aug 25, 2016 | cPanel, Technical Support

Secure transmission of data requires encrypting the data in many ways. Ciphers are the tools used for data encryption. RC4 is one such cipher. RC4 generates a stream of pseudo-random bits. These bits are combined with plain text using ‘bit-wise...

2 non-obvious reasons for “550-Please turn on SMTP Authentication” error in cPanel & Exchange servers, and what to do about them

by Visakh S | Aug 20, 2016 | cPanel, Plesk

SMTP error from remote mail server after RCPT TO:<user@domain.com>: host domain.com [xx.xx.xx.xx]: 550-Please turn on SMTP Authentication in your mail client. 550-(mail.server.net) [xxx.xxx.xxx.xxx]:36825 is not permitted to relay through 550 this server without...

How to fix ‘Disk usage warning’ alerts in cPanel/WHM servers

by Reeshma Mathews | Aug 18, 2016 | cPanel, Technical Support

At Bobcares, we provide outsourced technical support services for shared hosting companies. During this service span, we’ve resolved a multitude of server issues and errors. One among the very common issues faced by cPanel/WHM server owners is getting this disk...

What causes SpamAssassin error “Use of uninitialized value in concatenation (.) or string” in cPanel/WHM servers

by Visakh S | Aug 17, 2016 | cPanel, Server Administration, Technical Support

As an outsourced technical support provider for Shared Web Hosting Companies, we often encounter application errors and system faults. In the past couple of months, an error that’s often reported by cPanel/WHM users is: Aug 17 00:25:24.450 [382682] warn: Use of...
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