On 05/05/04 18:30 +0530, Suresh Ramasubramanian wrote: > Varun Varma wrote: > > > While on the subject of preventing spam, could someone please share > > horror/success stories of using Sender Address Verification [ala > > callbacks in Exim] before accepting mails? > > Some people seem to like it. But speaking as a provider whose domains > are very often forged into spam, I would say "don't use callbacks - it > puts a huge load on such domains". I do this, but only after my blacklists and whitelists are covered. Regular correspondents are whitelisted. New people get a check. Minimise your expensive checks.
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