On Sunday, August 14, 2005, 18:38:50, Gary wrote: > DNS PTR records are not needed to match your host name, as long as one has a > PTR record at all, that should suffice, but it is a nice free feature you > have there. There is no RFC requirement for hostnames = PTR records, let > alone PTR records at all. Some RBLs and ISPs do check for a basic PTR > though, as a spam check technique. e.g. AOL, and will reject if none are > found.
I usually set my mail servers to reject connection if the PTR contains dial-up, dsl or cable, as it's enormous help when dealing with viruses. > Hence the birth of SPF for spam checking. I still contend > that most of the ISPs do block SMTP outbound now.. including the largest in > the world AOL, along with Comcast, Earthlink, just to name a few. There are > also several in Europe, the largest being GMX, Tuscali, etc. A few now have > gone to SMTP auth even on their own servers. Heh, if the largest ISP in Slovenia (SiOL - Slovenia Online) would do that, there'd be a lot of complaining - they're known for messing up their own SMTP server settings regularly (read: at least once in two months), so many subscribers set up their own, more reliable SMTPs. -- < Jernej Simoncic ><><><><>< http://deepthought.ena.si/ > [The Bat! v3.51 on Windows 2003 5.2.3790.Service Pack 1] A university is a place where men of principle outnumber men of honor. -- May's Mordant Maxim ________________________________________________________ Current beta is 3.51.10 | 'Using TBBETA' information: http://www.silverstones.com/thebat/TBUDLInfo.html IMPORTANT: To register as a Beta tester, use this link first - http://www.ritlabs.com/en/partners/testers/
