Mailing list validation tool

[Bill Davidsen]

I'm looking for a tool to validate email addresses, not just as deliverable but 
actually valid. To do this the recipient mail server will need to be contacted. 
I have inherited a large mailing list, and since AOL has taken to rejecting 
delivery if any one recipient is invalid I don't want to burden the mail system 
by sending a 100k quarterly newsletter one at a time.

Is there a tool in Fedora?

Note: suggestions for other tools welcome, but I'd like one packaged which I 
don't have to find, build, and possibly maintain. I can use the socket library 
from newstools if I must, but I'd rather not roll my own if there's a solution 
of the "why didn't you just use..." type.

-- 
Bill Davidsen <davidsen at tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot