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

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

Bobcares provides website management services to website owners. Email errors are the most commonly encountered issues by the end customers.

Amongst these mail errors, ‘Sender verify failed’ is a prominent error that creates so much hassle to account owners. We’ve seen that it can be caused by issues ranging from improper file permissions to RFC non-compliance. (more…)

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

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

 

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 ispip.net (local.home) [XX.XX.XX.XX]:61647 I=[YY.YY.YY.YY]:465 closed by DROP in ACL

Do your customers report this error frequently? This happens when your customer’s ISP is blacklisted, leading to your customer’s mail being bounced. (more…)

How to resolve and prevent 554 5.7.1 : Relay access denied email errors in cPanel/WHM web hosting servers

In a shared web hosting environment like cPanel/WHM, Relay access denied email error is a common email issue reported by web masters. Over time, Bobcares help desk support services devised ways to resolve such issues in less than 10 minutes, and to an extend prevent these issues from happening.

Relay access denied error means, the server is refusing a mail to another server from a domain owner’s email client. The mail server is unable to confirm whether the domain owner is authorized to send emails THROUGH it. cPanel Exim email servers distinguish a valid sender when it gets a valid SMTP or POP/IMAP login from the domain user. (more…)

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