My company has 600 mailboxes with ISP
I have a zimbra installed locally for 50 users.
zimbar is not exposed to internet.
We connect to ISP and download all emails for users who have mailboxes on
My zimbra internal email domain is same as my email domain hosted with ISP.
When i send a email from local zimbra mail box to a user with mailbox at ISP (both have same email domain) the emails are sent out via zimbra server and not thru the "smart host" that i have set.
Any email sent from mailbox user on local zimbra server to outside domain is routed properly thru "smart host"
"WebMail Relay MTA" field is populated with the IP of the smart host server with port no 25 mentioned.
UserA@testdomain.com - mailbox user on zimbra
USerB@testdomain.com - mail box with ISP
UserA sends email to UserB. Since UuerB is not a local mailbox on Zimbra server, the mail is routed to internet and to the ISP server.
In the above situation, why is the email not routed thru the "smart host".
How can i acheive 100% email routing thru "smart host" in local LAN
Any speedy response would be highly appreciated.
Desperate for a answer/solution.
Thanks in advance.