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IP reputation is a different thing. I assume that this is why ESPs tend to drop mail from self-hosters. Low/no reputation or domestic IP often signal malicious
by sbuk 5y ago
IP reputation is a different thing. I assume that this is why ESPs tend to drop mail from self-hosters. Low/no reputation or domestic IP often signal malicious activity, so the big ESPs act accordingly. The later reasoning comes from the fact that a vanishingly small amount of email comes from domestic IP addresses, and the stuff that does is often malicious.
NB - I work for a large messaging security company.
- kjs3 5y agoI'm not exactly sure what argument you are making. Yes, ESPs often drop most self-hosted email because that's easy and economical (if, perhaps, dickish). No, if you're an international ESP (like mine) there is no real 'domestic IP' you can block against.