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How to resolve “Sender verify failed” SMTP mail error in cPanel/WHM Exim servers

by Reeshma Mathews | Feb 21, 2017 | cPanel

SMTP error from remote mail server after RCPT TO:<[email protected]>: host mx.server.com [xxx.xxx.xxx.xxx]: 550-Verification failed for <[email protected]> 550-No Such User Here 550 Sender verify failed Bobcares provides website management services to...

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:<[email protected]>: 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...

Here’s what causes “535 Incorrect Authentication Data” in cPanel Exim servers and how you can solve it

by Visakh S | May 16, 2015 | cPanel

2015-03-05 11:43:41 fixed_login authenticator failed for (ispip.net) ([XX.XX.XX.XX]) [YY.YY.YY.YY]: 535 Incorrect authentication data ([email protected]) In cPanel Exim servers, especially ones enabled with SMTP authentication, “535 Incorrect authentication...

Missing sent mails in iPhone or iPad? Here’s how you can sync IMAP folders in cPanel and Plesk mail accounts

by Visakh S | May 11, 2015 | cPanel, Plesk, Server Management

Now almost every webmaster uses a mobile device to check and reply to their business mails, but the increased mobility presents an issue of mails going out of sync between the various devices they use. Engineers in our help desk support team often receive requests to...

cPanel mail users frequently reporting “Increment Connection Ratelimit” errors? Here’s what you need to do

by Visakh S | May 7, 2015 | cPanel, Technical Support

  Increment Connection Ratelimit – ispip.net (local.home) [XX.XX.XX.XX]:61647 because of RBL match JunkMail rejected – ispip.net (local.home) [XX.XX.XX.XX]:61647 is in an RBL, see http://www.spamhaus.org/query/bl?ip=XX.XX.XX.XX SMTP connection from...
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