Technical articles and infrastructure guidance tagged Blacklist.
Technical articles and infrastructure guidance tagged Blacklist.
Note: Before you try to request removal, be sure to analyze your server to find out why you were listed in the first place. You have to fix the issue or they will just list your server again. Do not try to get removed…
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If you are blacklisted, your email will be rejected with a 421 or 550 SMTP error. You can spot this in your email server’s logs: Example of a 550 Error: Remote_host_said:_550-5.7.1…
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Like Senderbase.org, Spamhaus, Spamcop and other public real time blacklist (RBLs), you cannot simply lookup an IP at Yahoo! to see if it is blacklisted. You will need to determine the same using the bounce back message…
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