| Yes. Exim, Dovecot, SpamAssassin. In two systems: FreeBSD and Alpine Linux. I believe we need to keep doing this sort of thing, more. I haven't had the same problem as people widely complain when hosting their own email. FWIW since you ask, I put this down to: Using a quality ISP. VPS is ok, but not from widespread bulk providers. It seems to me that receivers judge quality by the network (eg. AS number) it originates from, not IP address. So you're judged by the quality of your neighbours and what those IPs are doing. Properly set up SPF and DKIM. Someone here was recently stating how impossible it was to host your own mail, but a commentator quickly showed they had misconfigured. Switching off IPv6. I love it in principle, but in practice there are big providers breaking IPv6. eg. Hotmail broke theirs a month or two ago. Or applying more stringent constants to IPv6 receipt. I don't relate to people who say you need to "warm up" an IP address. It seems they might be often trying to use bulk VPS/cloud providers who probably get a lot of abuse. I don't see it's in the receiving ISPs interest to constrain IP addresses which only generate small amounts of mail (by definition this is unlikely to be spam), and it would be easy to mistake the per-network reputation for this effect. Make sure you're not on the various public spam/block lists, though. |