background: windows 2003 servers, exchange 2003. all service packs, patches installed.
a problem sending e-mail to the mail server mail.freeman-designs.com
i keep getting delayed messages:
Will-Retry-Until: Wed, 13 Jul 2005 21:36:39 -0700
and ultimately failure and ndr of the message.
when i telnet from my main
mail server, to mail.freeman-designs.com 25 i just get a blinking cursor and then it times out (this server goes thru the
untrusted port of my firewall and has the ip address 22.214.171.124. i have tried telnetting from other computers that are
allowed smtp outbound and use the untrusted port ip and get the same results. these computers are all able to send mail to
other servers on the net.
when i telnet from a computer that has a different internet ip address, for example
126.96.36.199, i am able to successfully connect.
i have checked all the rbl's that i could find and
188.8.131.52 isn't on any list. why would i not be able to connect from my untrusted ip?
i have tried to
connect via ip rather than dns name, but this changes nothing. when i do an nslookup the mx record is correct as per
i contacted my isp, but he says "well, i can connect". that doesn't help me very much! i can connect
as well, but not from the untrusted ip adress that i need and use for everybody else!
i have been working with
this person's isp (mail.infinix.com) and because he uses the same mail server i can't send mail to him from my main mail
server. the isp claims that he is "wide open" and is using no blocking.
my reasoning is that if i can send mail
to everybody else, but not this guy he HAS to be doing something!
what's up with my untrusted ip address? i'm
worried that this will include other mail servers over time. i'd like to find the root cause, but everyone is shrugging