# escape any character \c = c (\n = n, \\ = \, ...). This format allow non-ascii
# strings and string concatenation " abcd " "ef" = " abcd ef".
# - ASCII-only strings can be written without double-quotes. They can be splitted
-# into several lines using shell-like escaping of EOL. A string begins on the
-# first non-blank character. This king of string can not contain semi-colons.
+# into several lines using shell-like escaping of EOL. A string begins and ends on
+# on a non-blank character. This king of string can not contain semi-colons.
# eg:
# The following format are equivalent:
# (1) this is a str\
# - data_filter: called on the DATA command (smtpd_data_restrictions)
# - end_of_data_filter: called on the END-OF-DATA command
# (smtpd_end_of_data_restrictions)
-# - ertn_filter: called on the ETRN command (stmpd_etrn_restrictions)
+# - etrn_filter: called on the ETRN command (stmpd_etrn_restrictions)
# - verify_filter: called on the VRFY command (no postfix hook ?)
recipient_filter = spamhaus_and_abuseat;