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 h...@help.domain.com<mailto:h...@help.domain.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 h...@domain.com<mailto:h...@domain.com>, and a contact for h...@help.domain.com<mailto:h...@help.domain.com>. The newly created Exchange mailbox, h...@domain.com<mailto:h...@domain.com> forwards to h...@help.domain.com<mailto:h...@help.domain.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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