When the text is not talking about filters, but about accept/reject rules and using the term "filter", try to find some other wording.
Bye, Marcus Index: smtpd.conf.5 =================================================================== RCS file: /cvs/src/usr.sbin/smtpd/smtpd.conf.5,v retrieving revision 1.148 diff -u -p -u -r1.148 smtpd.conf.5 --- smtpd.conf.5 22 Dec 2015 20:59:14 -0000 1.148 +++ smtpd.conf.5 2 Jan 2016 17:24:32 -0000 @@ -74,7 +74,7 @@ accepts and rejects messages based on information gathered during the SMTP session. .Pp For each message processed by the daemon, -the filter rules are evaluated in sequential order, +the rules are evaluated in sequential order, from first to last. The first matching rule decides what action is taken. If no rule matches the message, @@ -93,7 +93,7 @@ If specified, the rule will only be matc .Ar tag . .El .Pp -After that the client's IP address filter is specified: +After that the client's IP address rule is specified: .Bl -tag -width Ds .It Ic from any Make the rule match regardless of the IP of connecting client. @@ -116,7 +116,7 @@ is declared in the table .Ar table . .El .Pp -In addition, finer filtering may be achieved on the sender if desired: +In addition, finer access control may be achieved on the sender if desired: .Bl -tag -width Ds .It Xo .Ic sender @@ -247,7 +247,7 @@ The table will be used as the virtual domain mapping. .El .Pp -Further filtering may be achieved on specific recipients if desired: +Further access control may be achieved on specific recipients if desired: .Bl -tag -width Ds .It Xo .Ic recipient