Perhaps configurable if it is bound through a milter.It's configurable.
Milter - Wikipedia
I do not know if rspamd offers this possibility, I took a look at, but it is not small footprint.
Perhaps configurable if it is bound through a milter.It's configurable.
released?
Freedom leased a new netblock some time ago and I got a new IP number. Turns out mail from my server at home is now refused by hotmail because that netblock apparently has a nasty reputation. Guys at Freedom told me to inform hotmail myself, but I really think it's up to them since this affects a whole netblock...Nope, we're lucky to have Freedom Internet here (freedom.nl) which takes requests for rdns from residential customers and sets them up on both the IPv4 and IPv6 side of things for you. Shameless plug, I know, but they deserve it fair and square. I am, however, only hosting stuff from the VPS I rent. Having a residential/consumer IP block still runs you into blocklists from time to time when it comes to hosting mail.
The mainstream old telco dinosaur ISP doesn't do rdns for consumers, obviously. There are ways round that using GRE tunnels etc. but that's a whole different cookie.