noel jones ubdarhmeganvbhcsorg ram wrote fri 20080215 0929 0100 martin schmitt schmitt systems wrote ram schrieb postfix 234 want reject unresolvable recipient domains mails want use domains etchosts domains resolvable yet mails must accepted put smtp_host_lookup native yet postfix rejecting domains listed etchosts httpwwwpostfixorgpostconf5htmlsmtp_host_lookup postfix smtp client postfix smtp server martin ok reject unknown domains except sure remove reject_unknown_sender_domain maincf use something like maincf smtpd_sender_restrictions check_sender_access regexpetcpostfixsender_domainregexp sender_domainregexp unknown1examplecom dunno unknown2examplecom dunno reject_unknown_sender_domain example rejecting unknown sender domains adapted unknown domain checks noel jones wed 06 aug 2008 002747 0600 smtp_host_lookup working