Mail tips can be brilliant in Exchange 2010, its an easy way of getting a message to a user before he or she sends a email.
For example we use mail tips to let people know the SLA’s around our service desk:
So, how to do it:
Go to an Exchange Server,
Open the Exchange Shell,
Type:
set-mailbox MAILBOX -MailTip "THE MESSAGE TO DISPLAY"
Hit enter
Done.
