Some long-running programs on BIRCH (eg. those that install BLAST
databases) will send an email message to the BIRCH Administrator
upon completion. This will only work, however if your computer runs
an email server. If your computer doesn't run an email server,
programs will still run and produce results correctly, but you won't
get an email notification when they are complete.
Note: For the purposes of BIRCH, only outgoing email needs to be
enabled. None of the BIRCH system, at this time, utilizes incoming
email, so you might want disable incoming email to eliminate a
potential security target.