Allow BY... qualifiers to coexist with frequency qualifiers at the same
resolution, even though such combinations may not make sense.
1# Local delivery to Cyrus: 2#local@$MAIL_DOMAIN lmtp:unix:/var/run/cyrus/socket/lmtp 3# Local delivery to Dovecot: 4#local@$MAIL_DOMAIN lmtp:unix:/var/run/dovecot/lmtp