Looking the SMTP dialog for ETRN:
SMTP greetings
ETRN mydomain.com
I concluded that mydomain.com was "pulling" the queued mail from the Imail
server in that SMTP session. mydomain's "SMTP client" contacts the Imail
"SMTPD server" and signals ETRN. support@ipswitch tells me that in fact
Imail SMTPD server closes that SMTP session and establishes a new "SMTP
client" client session with mydomain's SMTPD server to "push" the queued
mail to that ip address of mydomain.com found exclusively in NT hosts file.
That's both how and why an ETRN domain must have a fixed ip address that
the Imail side must defended against spoofing because the fixed ip address
is the only security angle in the ETRN transaction.
fwiw
Len
Please visit http://www.ipswitch.com/support/mailing-lists.html
to be removed from this list.
