relay authentication not working

[Coty]

Folks:

I have two different Exchange 2000 SP3 servers on two entirely different domains with the same problem.

I cannot relay emails from remote (IE not on the same net) to another remote email address (IE addresses not on that email domain). This of course is an example of a closed relay...BUT...when I check the "Allow all computers which sucessfully authenticate to relay, regardless of the list above" in the relay restriction tab it still does not work :-( My OE client has "My outgoing server requires authentication" checked as well. When I try to send it gives the generic "The following recipient(s) could not be reached: 550 5.7.1 Unable to relay for email@domain.com" message. Also note the Access Control/Authentication tab has anonymous, basic and intergrated checked.

I do not suspect a DNS problem...since you can add the IP of the remote client into the relay restrictions list of allowed IPs and it works like a champ.


Any help would be appreciated!

Thanks
Coty

 

[Coty]

Anyone??

 

[Coty]

Figured it out: "no fixup protocol smtp 25" in the PIX firewall...

SMTP authentication will not work if the fixup protocol smtp 25 line is in there :-(

 

[dugr]

I'm having the same problem. I have the line "fixup protocol smtp 25" in my PIX config. Is this the line you had or did you have "no fixup protocol smtp 25"?

Thanks,
Doug