I'm not an exchange guy, so I can't help much in that area. Is there any reason why you have to use the exchange server as a relay?
Jeremiah E. Bess Network Ninja, Penguin Geek, Father of four On Sat, May 30, 2009 at 21:28, Jibz <[email protected]> wrote: > 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 -~----------~----~----~----~------~----~------~--~---
