This appears to happen more often these days: I send a message to a user
and some blacklist system blocks my message.  I have no control over
what my ISP does, these services simply block my message without a way
for me to fix this.

Please, don't use these blacklist services, they are very annoying.
They think they can reduce spam, but only by blocking legitimate
messages.  I rather have 100 spam messages than losing one real message.
Also, there is no reliable way to tell if a message is spam or not.
Some of these services even ask money to be removed from the list, which
is close to extortion.

Specifically my message to George Reilly started failing today.
Messages to Mattias Winther were blocked for a longer time.

-- 
FATHER: One day, lad, all this will be yours ...
PRINCE: What - the curtains?
                 "Monty Python and the Holy Grail" PYTHON (MONTY) PICTURES LTD

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\        download, build and distribute -- http://www.A-A-P.org        ///
 \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///

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