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Unfortunately, it's just easier for the big ESPs to ignore/drop email from the self-hosters than deal with it. Which sucks, alot. N.B. - I used to work for a
by kjs3 5y ago
Unfortunately, it's just easier for the big ESPs to ignore/drop email from the self-hosters than deal with it. Which sucks, alot.
N.B. - I used to work for a Very Large ESP.
- sbuk 5y agoIP 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.
- upofadown 5y agoOr in other words: big ESPs have a problem with false positives... which is a known problem.
- kjs3 5y agoOh sure...no argument there. But it's a scale issue. In this space, I have, say, 500M 'questionable' IP addresses who potentially send/receive mail (known bad, residential networks, uncategorized, etc.). So let's be wildly generous and say 0.1% of them want to host an SMTP server. Does the ISP commit resources to this tiny community, or do they commit those resources to keep Google/M$/Yahoo/etc happy, who constitute 9-something% of the business.