Thanks in advance for any help you guys might be able to provide.
I've got a completely working Zimbra box set up in my domain. The intention is to use it to host internal e-mail, and I've set the domain to be domain.local. The outside world sends e-mail to this company's pop server at domain.com.
Sorry if that's a bit confusing, but let me try to diagram it out:
1) Internal users get a firstname.lastname@example.org address. Most internal users also have a email@example.com address. Please don't ask me why they want it like this...
2) Internal users then configure their Zimbra account, let's say firstname.lastname@example.org, to pull mail from their external account, email@example.com. This pulls mail fine.
3) I've tried to set that account to send from firstname.lastname@example.org but that field is grayed out, fixed at email@example.com (unless I add the domain, but that would cause other problems...see below).
4) So when I send to an external account, let's say a Gmail account, the "From" field still shows "firstname.lastname@example.org" but I've set the "Reply to" field to "email@example.com".
When I send from firstname.lastname@example.org to email@example.com it works fine.
When I send from firstname.lastname@example.org to email@example.com it works fine.
When I send from firstname.lastname@example.org to email@example.com it kicks back with a message from the mail server at domain.com saying that the domain could not be resolved...of course it can't be resolved because domain.local is only local, not in the cloud.
I've contacted the webhost for domain.com and they tell me that they can't add an MX record for domain.local to simply resolve to. They also told me that they can't add it to a white list of some sort.
So, my question comes down to this: How do I set Zimbra to enable firstname.lastname@example.org to send as email@example.com WITHOUT adding domain.com to the Zimbra server's domain list?
The reason I can't add it to the server's domain list is because there are external users who will need to be able to access their mail, and if I add it to the Zimbra server's domain list it will keep the mail internal and it will never go outside the office.
Please, any suggestions? This wouldn't be a problem if I could set the "From" field without having to add the domain. Zimbra should have the ability to send from a particular account - Outlook has this. For example, if I have firstname.lastname@example.org and I add email@example.com, I should be able to send from (as) firstname.lastname@example.org, since I've already authenticated to Gmail for that account!