Is there any way i can tell my mail server to not to deny that IP? Can i change the configuration not to check for relay?
On Sun, May 31, 2009 at 2:48 AM, Jeremiah Bess <[email protected]>wrote: > This is because your internet address does not reverse map to the DNS > domain you are sending from. You need to set your external DNS to use your > NATed address, or use a dynamic DNS hosting service like dnydns or > no-ip.com. > > Basically, when you go to iptools.com and do a MX lookup for > yourdomain.com, it should show the internet address of your ISP modem. > Additionally, your IP should reverse map to yourdomain.com. > > Jeremiah E. Bess > Network Ninja, Penguin Geek, Father of four > > > > On Sat, May 30, 2009 at 12:10, Jibz <[email protected]> wrote: > >> I have setup a mail server on CentOS 5 >> >> >> sendmail-8.13 >> >> I'm able to sent and receive mails from yahoo and gmail. >> I've another microsoft exchange server on the same network. Mails sent >> from that server to my mail server gets bounced. >> >> I got this error in /var/log/mail >> >> *May 30 22:11:24 myhostname sendmail[31981]: n4UGfO5L031981: >> ruleset=check_rcpt, arg1=<[email protected]>, relay= >> mx1.exchangeserver.com[public IP of exchange server] (may be forged), >> reject=550 5.7.1 <[email protected]>... Relaying denied. IP name >> possibly forged [public IP of exchange server] >> >> May 30 22:11:24 myhostname sendmail[31981]: n4UGfO5L031981: >> from=<usern...@exchangeserver>, size=0, class=0, nrcpts=0, proto=SMTP, >> daemon=MTA, relay=mx1.exchangeserver.com [public IP of exchange server] >> (may be forged)* >> >> As the exchange server is in my network if you do a lookup for the domain >> name of that server you will get the local IP only. >> >> So i changed the entry of my /etc/hosts file >> >> and added >> >> <PUBLIC IP> <exchangeserver.com> >> >> Now still the mails bounces but a different error >> >> *May 30 22:42:10 myhostname sendmail[32645]: n4UHCASl032645: >> ruleset=check_rcpt, arg1=<[email protected]>, >> relay=mail.exchangeserverom [public IP of exchange server], reject=550 5.7.1 >> <[email protected]>... Relaying denied >> >> >> May 30 22:42:10 myhostname sendmail[32645]: n4UHCASl032645: >> from=<usern...@exchangeserver>, size=0, class=0, nrcpts=0, proto=SMTP, >> daemon=MTA, relay=mail.exchangeserver[public IP of exchange server]* >> >> Please help me out!!!! >> >> >> >> > > > > -- "The will of God will never take you where the Grace of God will not protect you." --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Linux Users Group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] For more options, visit our group at http://groups.google.com/group/linuxusersgroup -~----------~----~----~----~------~----~------~--~---
