I have setup Microsoft Windows 2008 SBS Server in My Organization. I am using "Adsl Internet Connection" having "Dynamic IP address". Pop3 connector is configured on My SBS 2008 Server so that users received their internet email & Smart host is also configured so that users send email to external internet domains.
Smart Host: exmail.emirates.net.ae
Require Authentication: firstname.lastname@example.org
Problem is that whenever our users send email to external internet domains, Receiver of other domains receive our message like this "email@example.com" on behalf of "George Michael" where George Michael is our user. How we can hide / remove this message and why this message is apearing, whats the reason, even i didnot configure Send on behalf for any user in my domain?
our local domain: dubai.local
our external domain: abc.ae (for example)
our users can send email locally and externally. we set .ae address as their primary email address so whenever they send email to internet domains mails goes from their primary address.
[Before we had a static ip on lease line and we were using smart host "mailv.emirates.net.ae" and "mail.emirates.net.ae" and emails from our domains goes to external email domains without having send on behalf message. etisalat dynamic ips are usually black listen in many rbl therefore we cannot use "mail.eim.ae, mail.emirates.net.ae; mailv.emirates.net.ae to relay our emails to external domains].
if you are using other service provide like "Duo" you can use etisalat smart host "exmail.emirates.net.ae" for sending & receiiving emails.