Re:Show HN: OpenBSD Email Service – A free-email alternative
by icebraining on Friday February 16, 2018 @02:12PM
(#16394998)
Do you have a fixed or dynamic IP? When I tried sending email from my home network (which had a dynamic, if long-lasting IP), I discovered my ISP's addresses where on the PBL[1] and therefore getting rejected by many servers. This was in Europe, not the US.
[1] https://www.spamhaus.org/pbl/