smtp communication problem
Posted on 2007-11-19
ok i can send emails to only certain domains i.e. yahoo, gmail, etc. i am not able to send mail or the messages are not getting delivered to the destination. i think they are requiring some sort of authentication. please help i am really stuck
this is my situation. i have one server running windows server 2003 R2 and exchange 2003 sp2 on it.
my internal domain is .local
my external domain is .org
all my dns is hosted by my isp
i have one forward lookup zone for .local and there are forwarders in it to go to the dns servers of my isp
nothhing else in my dns is configured
my smtp banner is myserver.mydomain.org
all this sits behind a watchguard firewall that i have configured.
all the ip's from my isp are pointed through the firewall to my server.
i have control over whatever you would like to try.
my question is that for mail my isp has a host record for mail.mydomain.org and the ip of 12.xxx.xxx.xxx
the 12.xxx.xxx.xxx is pointed to my server through the firewall. incomming mail is fine. thoutgoing is sometimes the problem where my users mail sometimes does not reach the intended recipient.
from what you have read is there anything that i have done wrong?? is there anything that i need to change or add. does my smtp banner need to match the host record created by my isp?? (i.e. does it need to be mail.mydomain.org instead of myservername.mydomain.org.