The compat_check FEATURE in sendmail
allows discarding, temporarily failing, or permanently rejecting mail
based on an envelope sender and envelope recipient combination.
compat_check is used in conjunction with access_db. FEATURE(access_db) must appear before FEATURE(compat_check) in your sendmail macro configuration file. Place compat_check rules in the access database (i.e. /etc/mail/access).
Mail from the envelope sender firstname.lastname@example.org to the envelope recipient email@example.com will be discarded.
Note: if this message from firstname.lastname@example.org was addressed to multiple envelope recipients, only the message to email@example.com will be discarded. Other envelope recipients will receive the message.
Last modified: 08/18/2005