[exim] apologies for the reject

sorry, but a "minor" screwup in my home server, skillfully performed
at 2:30 am, just to fix my local sender verification, has caused the
first bounces from my server in three years! You will have not
notices, but the listserver yes...

This is just to prove that if one pulls exim configuration to the
level of sendmail incomprensibility, the worst can happen.

I will come back with the analysis of the mistakes.

Giuliano (if I am still subscribed...)