[rt-users] Problems with Outlook Interpreting RT From Headers

[Stevo]

Hey All,

I'm sure this has been dealt with in the past, but I can't find any 
solution...

When one of my users open (or reply to) a ticket via email RT generates 
an email to me with the following from line:

Apache [apache at itsupport.company.local]; on behalf of; Test User via RT 
[itsupport at itsupport.company.local]

Thunderbird interprits this just fine and displays the Test User via RT 
as the sender, however there is a problem with Outlook.

I added itsupport at itsupport.company.local into our Exchange Global 
Address List as an alias for a user called IT Support so users could 
easily create a ticket.  Now everytime I get a ticket from ANYONE it 
shows the email is being sent from IT Support (rather than the users 
name via RT).

This has to be a common problems - and no the answer is not to convert 
everyone to Thunderbird!!

Any ideas here... has anyone beaten this Outlook issue??

Thanks

Stevo