Just thought I’d throw this tip out there if you are running Exchange in your environment. I have RT configured on my CentOS 5.5 box, help.domain.com. My /etc/alias file uses firstname.lastname@example.org:email@example.com for incoming requests into my main helpdesk queue. What I’ve done with Exchange, that hosts for domain.com, is to create the email firstname.lastname@example.org:email@example.com, and a contact for firstname.lastname@example.org:email@example.com. The newly created Exchange mailbox, firstname.lastname@example.org:email@example.com forwards to firstname.lastname@example.org:email@example.com. What this allows me to do is use delivery restrictions on the Exchange account to limit the help desk to authenticated users only, thus blocking outside requests. I know RT has it’s own mechanism to do this, but this allows me to open it up easily if I need to, and I can use LDAP authentication alongside local users in RT.
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