On Tue, 21 May 2002 at 07:55 GMT -0500 (21/05/2002 19:55 where you think I live) "Jonathan Angliss"=[JA] wrote to [EMAIL PROTECTED] :
> How many people do you know that try doing reverse lookups on domain > names/ip addresses in email headers? Not many I know of. This is be trend lately, my Server does check Sender Domain, RDNS and HELO/EHLO command from MTA Sender. For me, this is not just to prevent /real/ spammer but also from deception viruses such Klez. There is articles why someone do this from other POV : http://www.tzo.com/mainpagetext/ProblemSendingEmail.html http://www.internetnews.com/isp-news/article/0,,8_976831,00.html And last but not least, an opinion from one List Administrator of known list ([EMAIL PROTECTED]) : ---begin copy--- >From : Steve Platt <[EMAIL PROTECTED]> To : Syafril Hermansyah <[EMAIL PROTECTED]> Date : Wednesday, February 20, 2002, 10:10:00 PM Subject: PTR records PS - note the difference between the SMTP Sender's domain and whether it exists and the IP address of the sending host (which could be quite different, as in messages from a mailing list). I used to block messages from IP addresses that didn't resolve (PTR lookup) but got too many complaints from people who couldn't mail us and had no control over their ISP's setup - often big ISPs got their DNS PTR records wrong! However, we still insist that the SMTP sender domain exists in the DNS, on the grounds that (auto)replies may not work unless the domains are correct. I think we also insist that header line sender addresses are resolvable too (again to ensure replies work). Cheers, Steve ---end copy--- BTW. I didn't activate RDNS for home.worldless.net. -- Best regards, - Syafril - mailto: [EMAIL PROTECTED] Flying with The Bat! 1.60m under Windows 2000 5.0 Build 2195 Service Pack 2 ________________________________________________________ Current Ver: 1.60m FAQ : http://faq.thebat.dutaint.com Unsubscribe: mailto:[EMAIL PROTECTED] Archives : http://tbudl.thebat.dutaint.com Moderators : mailto:[EMAIL PROTECTED] TBTech List: mailto:[EMAIL PROTECTED] Bug Reports: https://bt.ritlabs.com
