> the RFC's are nice but in this days everybody who maintains a mailserver > has to look that HELO is a vild hostname which resolves in both directions > or has not to wonder if his mails are dropped! > > not all things that are not explicit forbidden are well behavior!
That's right, but does not solve our problem. We host mailsystems for big customers. One of them is a provider for a special hotel platform. As they get mails from around the world, and the mails are something like reservation mails, we need to accept them. We alredy deny everything not rfc conform, or better, we WANT to deny anything NOT rfc conform. So, is there any clean solution for this?
