hanspeter kunz rnthwifiuzhch hello im trying rewrite received headers sasl authenticated senders order avoid mails classified spam sending dynamic ip header_checks pcrepcre_dirauth_received_header_anonymisationpcre works fine one recipient received 1921682111 80218159224dclienthispeedch 80218159224 authenticated sender hkunz nikolaiifiuzhch postfix esmtp id 342302a6b2b wed 20 feb 2008 180717 0100 cet rewritten something like received authenticated sender hkunz nikolaiifiuzhch postfix esmtp id 1069b2a6b31 wed 20 feb 2008 181646 0100 cet soon recipients cc received header rewritten looks header_checks applied emails use postmap q received header email matched rewritten correctly would grateful hints occurs postfix version 246 debian etch many thanks hanspeter 2 matchrewrite rules anonymise received headers saslauthenticated clients note host name nikolai purpose received digit715 _alnum digit715spaceauthenticated sender spaceby nikolaiifiuzhch esmtp id afdigitspacefor replace received authenticated sender 3 4 5 6 id 7 8 9 received digit715 _alnum digit715spaceauthenticated sender spaceby nikolaiifiuzhch esmtp id afdigit replace received authenticated sender 3 4 5 6 id 7 8 thu 07 aug 2008 194208 0100 header_checks handled differently emails one recipient