男は黙ってpostfix。 とりあえずsmtpd_sender_restrictionsの中身、はっときます。 smtpd_sender_restrictions = permit_mynetworks check_sender_access hash:/etc/postfix/sender_access reject_unknown_sender_domain reject_rbl_client relays.ordb.org reject_rbl_client dialup.blacklist.jippg.org reject_rbl_client mail-abuse.blacklist.jippg.org reject_rbl_client shortbl.blacklist.jippg.org reject_rbl_client dul.dnsbl.sorbs.net rejec