Knowledgebase
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Poor IP Reputation / Poor MTA Reputation Bounced Error Message
Posted by on 18 October 2016 02:51 PM
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If you ever find your server/hosting's IP got blacklisted and email delivery not is not conducted properly, here are some common reasons why an IP might receive a poor reputation:
1) There have been reports of spam activity from your IP. Look up your IP's reputation on SenderBase and check the "DNS Based Block Lists" area to see whether it is listed on any of the common DNSBLs. 2) The server/hosting IP exhibits DNS patterns that indicate compromise by a SpamBot. Make sure your DNS is configured according to the protocol for RFC5321, section 4.1.1.1 (Full text available here)
3) The antispam organization sensors have received emails from your IP that contained links to domains hosting or distributing malware. If the issue has been fixed, this score should be improve automatically within 3-5 days. If the mail score does not improve within 3-5 days after you think you have fixed the problem, feel free to contact us for further assistance here.
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