Reply based on domain

TheBat-techies,

 This should be simple for you RegExp experts:

 At work we have to add a ridiculous disclaimer for outgoing mail.
 Normally for internal mail we do not use it.

 So, I'd like to set up the following:

    If Recipient contains "company domain", then use QT "A"
    If not, then use QT "B".

 This should work for both new messages and replies.

 Could anyone help me?

-- 
<greeting> Best regards </greeting>
<author> Peter Fjelsten </author>
<thebat version> 3.0.1.33 </thebat version>
<os> Windows XP 5.1 Build 2600 Service Pack 1 </os>