Sendmail 8.9.3 Release Notes

24 Chapter1
New and Changed Features
New Features
If the above lines are included in the sendmail.cf file then, all header
messages of the form "Message-Id:" will result in the ruleset
SCheckMessageID to be called which will check the validity of the
Message-Id header.
Turning on this feature will increase the time sendmail takes to
deliver a message as sendmail will now perform header checking.It
will also check sender and recipient addresses by default (feature of
sendmail-8.9.3).
An exhaustive list of the various HHeader format headers are
described in the sendmail O’Reilly book.
Other New Features
The following are the additional features introduced in this release of
Sendmail:
• Allow multiple -qI, -qR, or -qS queue run limiters.
example: sendmail -qRfoo -qRbar which would deliver mail to
recipients with foo or bar in their address.
• New map flag -"Tx" appends "x" to lookups that return temporary
failure. This is similar to "-ax" flag which appends "x" to lookups that
return success.