>> [Wants a send-to-everyone feature in the local college SM]

pl> I can hardly imagine that it is feasible to keep a SM address
pl> group synched with a list of ALL students at a university!  That's
pl> a pretty poor solution for what should be done with list
pl> management software instead.

Or, said another way, stop trying to put this more or less impossible
task into your sending software (SM), and delegate it instead to your
email infrastructure.  List management software is one path.  Pushing
this down to your MTA is another.

Paul mentions some dynamically doing a query to get a list of
addresses and then ... well, I shudder to think, but I guess you end
up sending 5,000 individual messages or 100 messages with 50
addressees or something.  Using a query scheme has a lot of creative
uses, but it obviously doesn't scale.  Not when the answer is
"everybody" for large values of "everybody".  At that point, it's not
creative.

If you instead define an email alias in your MTA (sendmail, exim,
qmail, or whatever), you need merely address your message to that
alias and let your mail plumbing do the fan-out.  If it has to do a
dynamic query to some directory and build message envelope lists from
that, what do you care?  That's the job it's taken on.  It's also
useful whether you use SM or something else.  (The MTA can implement
restrictions like only allowing certain senders to use the alias.)
-- 
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