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Unused IP, set PTR (seems important) and MX, SPF and DKIM, although I'm not sure how relevant the last one was. I can imagine that Gmail will block you if you t

by gsich 8y ago

Unused IP, set PTR (seems important) and MX, SPF and DKIM, although I'm not sure how relevant the last one was. I can imagine that Gmail will block you if you try to send mail from an IP that was previusly used to spam.

pbhjpbhj 8y ago
Couldn't really work out why Gmail wanted to block me, yes obvs using SPF/DKIM/etc. - long trusted domain (15y), never any spam, whitelisted on client side. MS blocked it according to their third-party system because it was associated with another IP address [ie other IP was once used by same ISP] that had once had spam on it (wasn't currently blacklisted in any SBL). There's no way to check before you build out the system, so unless you have an easy way to change IP and ISP then I'd be cautious.
- gsich 8y ago
  I was not thinking about self hosting at home.