Search Again: Re: mailserver A''s/CNAME''s From: Len Conrad Date: Wednesday, January 9, 2002 Time: 12:54:44 pm >I've been having some problems with AOL rejecting mail from my mailserver. what's the reject message? >My configuration is quite simple, I have POP and SMTP running off the same >server. > >I have an A record in the domain for the SMTP name of the server >("mail.xyz.com"), and I have a PTR record in the reverse domain for >"mail.xyz.com". ok >Now, I tell all my clients to use "pop.xyz.com" for POP, and >"mail.xyz.com" for >SMTP...I don't have a good reason for this, except that it seems other >people do >this and who knows, maybe I'll split it between two servers in the future. great idea. >The real question is, to avoid reverse lookup problems with AOL, should >"pop.xyz.com" be an A record pointing to the IP address of the server no, I'm pretty sure AOL doesn't reject mail from ip's of servers with no PTR record. They would reject 50% of internet mail servers. >, or a CNAME record pointing to "mail.xyz.com" avoid the CNAME, use A record. >I assume that it's a bad idea to have 2 A records and 2 PTR records both >pointing at the same IP. two PTR records for the same ip in the same zone file is useless, since most apps only look at the first one. what's the error message when AOL rejects your mail? Len ___________________________________________________________________ Men & Mice: QuickDNS - DNS Expert - DNS Training - DNS Consulting DNS Classes: Maidenhead, 01/21-23/02, Frankfurt 02/13-14/02 http://www.menandmice.com/8000/8100_course_schedule.html

Messages In This Thread: mailserver A''s/CNAME''s by andrew on Jan 9, 2002 at 12:50:17 pm Re: mailserver A''s/CNAME''s by Len Conrad on Jan 9, 2002 at 12:54:44 pm Re: mailserver A''s/CNAME''s by Global Homes Webmaster on Jan 9, 2002 at 1:01:40 pm Re: mailserver A''s/CNAME''s by Global Homes Webmaster on Jan 9, 2002 at 1:04:16 pm Re: mailserver A''s/CNAME''s by andrew on Jan 9, 2002 at 1:33:00 pm Re: mailserver A''s/CNAME''s by Philip Chonacky on Jan 9, 2002 at 1:43:59 pm Re: mailserver A''s/CNAME''s by andrew on Jan 9, 2002 at 2:35:19 pm Re: mailserver A''s/CNAME''s by Len Conrad on Jan 9, 2002 at 2:37:55 pm Re: mailserver A''s/CNAME''s by Len Conrad on Jan 9, 2002 at 3:07:21 pm Re: mailserver A''s/CNAME''s by andrew on Jan 9, 2002 at 3:37:54 pm