On fre 12 nov 2010 19:08:57 CET, mouss wrote
the "general" syntax is sendmail -f sender rcpt1 rcpt2 ... < messagefilebut I have no idea how to run this from a dovecot sieve script...
sieve cant run external tools like sendmail, its not even sieve in lda if you like to have any case of needs then try procmail -- xpoint