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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...
2 reasons why you get “530 Login authentication failed” in your cPanel Pure-ftpd server and how to fix it
In our role as Website Support engineers for online businesses, managing FTP servers and resolving the related errors, is a task we usually perform. "530 Login authentication failed" is a common error reported by users in cPanel Pure-ftpd servers. This error occurs...
cPanel IP block – How to resolve and prevent IP blocks in cPanel/WHM servers
Web hosts can never shun server security! Majority of them have setup firewalls such as CSF/LFD to protect their cPanel servers by blocking IP addresses of attackers or malicious users. But we've seen many cases where these firewall settings are not proper, blocking...
Blocking spoofed mails going out from your cPanel/WHM server to protect it from blacklists
Outgoing spam is a major head ache for many web hosts. Spammers use compromised websites or mail accounts to send thousands of spam mail within a few mins. By the time the web host comes to know about it, the server IP would be blacklisted (eg. SpamHaus SBL), and...
How to fix error “454 4.7.1 Relay access denied” in Postfix mail servers
454 4.7.1 <user@domain.com>: Relay access denied This is a commonly seen email failure error by web hosts, website owners and server owners who run Postfix mail server. 454 error usually happens while sending to and receiving from external domains. In our role...
How to fix “554 5.7.1 : Relay access denied” email errors in web hosting servers
554 5.7.1 : Relay access denied error is caused when sender authentication fails (corrupted DB, incorrect login, etc.) or recipient spam filter rejects mail.
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