On 2022-10-19 07:43, Cameron Simpson wrote: > On 17Oct2022 21:19, Tim Chase <m...@tim.thechases.com> wrote: > >I found that I had to both set my SPF for the sending-server (in > >my case, my VPS is the sender, rather than outsourcing to a smart-host > >elsewhere), > > I tried that for us, but some places reject email from our cloud server, > which is an AWS VM. So the home server runs outbound mail for some/all > things through the ISP smart host.
Some IP ranges (particularly cloud-service instances which spin up & down and may have different hosts appearing at the same IP addres) also have trouble. For mine, I had the instance running (on the same IP) for a year or two before I decided to move my mail functionality there, so I knew it didn't have a history of recently spamming other hosts. Similarly, home ISP ranges are also often rejected because the rDNS resolves to something auto-generated rather than the actual domain-name. Just in case you're looking for other tilt-bits that might be used when rejecting messages. -tkc
