@JaredBusch said in DNS Help ...:
@EddieJennings said in DNS Help ...:
@JaredBusch said in DNS Help ...:
@Dashrender said in DNS Help ...:
@JaredBusch said in DNS Help ...:
PTR records are handled by the ISP.
They are not something that should ever result in a domain name like this. but at some point in history, people always tried to contact their ISP to have PTR updated to thier mail server DNS name.
it's part of anti-spamming.
No, it is not.
This kind of thing might be what Dash is thinking of.
https://www.altn.com/Support/KnowledgeBase/KnowledgeBaseResults/?Number=KBA-01904While not explicitly a tool for anti-spam, I remember an MDaemon installation I inherited have reverse lookups enabled.
NO, old guides used to claim that you needed to setup PTR for on site Exchange to make sure you had not SPAM issues. I know what he is talking about. Jus tthat it has never been fact, no matter what people used to say.
I'm with Jared on this. Yes, historically it was common to do this thing but it was a myth. It's just one of those things that people repeated a lot but had no technical reasoning behind it. People generally don't understand DNS and so DNS becomes one of those magic black boxes and once someone made up that PTR could have something to do with SPAM people ran with it. But it was never part of a spam blocking or reduction mechanism, it was just a random, foolish technical mistake that people made thinking that it might have something to do with something else that they didn't understand.