Category: Standards Track                              Oceana Matrix Ltd.
about any string or address in a message header or envelope.
messages is available at <http://www.imc.org/ietf-mta-filters/>.
to the first, second, ... groups within the regex?
comparing strings to regular expressions.
# Try to catch unsolicited email.
header :regex :comparator "i;octet" "subject"
"i;ascii-casemap" comparators and may be used with them.
boundaries and backreferences are not supported by this extension.
unsupported by this specification as a syntax error.
Jutta Degener and Ned Freed for their help with this document.