I have a WSS server in the DMZ that cannot send email via SMTP. I
have tried several configurations but the two main ways are as
follows. I configured SMTP on my WSS server and configured the
default server settings on the Central Administration pages to use the
local SMTP server. At that point, I attempted to send a notification
through WSS but I receive an error that the E-Mail configuration on
the server is incorrect. Looking through the SMTP folders, the
message is not there and never received. Then, I attempted to telnet
to port 25 on the SMTP server and the message went through without a
problem. Blat on the server works as well.
The second configuration was to point WSS to my mail relay and attempt
to send a message. Again, WSS gives me the error. I then attempted
telnet and blat through the mail relay and all works.
Any thoughts?