# currently only email OR hostname fields are supported. You MUST choose only
# one of these types per strlist, and be carefull that the field you requested
# are available in the protocol state you want to use this filter for.
-# * hostname fields: helo_name, client_name, reverse_client_name
+# * hostname fields: helo_name, client_name, reverse_client_name, sender_domain,
+# recipient_domain
# * email fields: sender, recipient
# No space is allowed in this parameter.
# Return value:
# emitted by postfix. This list with description of each
# field is available at:
# http://www.postfix.org/SMTPD_POLICY_README.html
+# postlicyd also support fields sender_domain and recipient_domain
# * OP is an operator. Available operators are:
# == field_name is strictly equal to value
# =i field_name is case insensitively equal to value