Search Again: Re: Reverse DNS problems From: Len Conrad Date: Saturday, February 7, 2004 Time: 1:54:17 pm > ----- The following addresses had permanent fatal errors ----- ><newman@world2you.com> > (reason: 550 5.1.1 user not known) that MTA can't resolve newman@world2you.com. As Chris said, not a (reverse) DNS problem. mx1# telnet 65.16.71.232 25 Trying 65.16.71.232... Connected to jetson.world2you.net. Escape character is '^]'. 220 jetson.world2you.net ESMTP Sendmail 8.12.10/8.12.10; Sat, 7 Feb 2004 15:36:18 -0600 helo this.is.len 250 jetson.world2you.net Hello mx1.offsitenow.com [204.60.9.173], pleased to meet you mail from:<lenconrad@menandmice.com> 250 2.1.0 <lenconrad@menandmice.com>... Sender ok rcpt to:<newman@world2you.com> 550 5.7.1 <newman@world2you.com>... Relaying denied. Proper authentication required. quit 221 2.0.0 jetson.world2you.net closing connection Connection closed by foreign host. ...yep, your MTA is screwed up, not DNS. > Mail server on 65.16.71.232. This is jetson.world2you.net matching PTR and A records ok, the DNS is fine: mx1# dig -x 65.16.71.232 ;; ANSWER SECTION: 232.71.16.65.in-addr.arpa. 2H IN PTR jetson.world2you.net. ;; AUTHORITY SECTION: 16.65.in-addr.arpa. 2H IN NS alpha.birch.net. 16.65.in-addr.arpa. 2H IN NS beta.birch.net. birch's DNS are authoritative and answering for that IP, not your DNSs. mx1# dig -x 65.16.71.232 ;; ANSWER SECTION: 232.71.16.65.in-addr.arpa. 2H IN PTR jetson.world2you.net. Len

Messages In This Thread: Reverse DNS problems by Larry Newman on Feb 7, 2004 at 11:37:59 am Re: Reverse DNS problems by Men & Mice Support on Feb 7, 2004 at 12:25:50 pm Re: Reverse DNS problems by Len Conrad on Feb 7, 2004 at 1:54:17 pm