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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.
Gmail blacklist removal for your mail servers
550-5.7.1 [203.**.**.**] Our system has detected an unusual rate of 550-5.7.1 unsolicited mail originating from your IP address. To protect our 550-5.7.1 users from spam, mail sent from your IP address has been blocked. Many often, you'd have had your customers...
How to prevent SpamHaus SBL (Spamhaus Block List) blacklisting in web hosting servers
554 5.7.1 Service unavailable; Client host [154.0.***.**] blocked using zen.spamhaus.org; https://www.spamhaus.org/sbl/query/SBL289647 SMTP error from remote mail server after pipelined DATA: 550-197.242.**.*** listed at zen.spamhaus.org You'd seen these error...
10 tips to prevent database corruption in your web hosting servers
Many websites run database-driven applications, and a single missing entry in these tables can lead to website downtime. Database corruption is an alarming scenario for webhosts, who end up spending time and effort repairing and restoring their customer databases. At...
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