NAME

       MIMEHeader - perform regexp tests against MIME headers

SYNOPSIS

         loadplugin    Mail::SpamAssassin::Plugin::MIMEHeader
         mimeheader    NAME_OF_RULE    Content-Id =~ /foo/

DESCRIPTION

       This plugin allows regexp rules to be written against MIME headers in the message.

RULE DEFINITIONS AND PRIVILEGED SETTINGS

       mimeheader NAME_OF_RULE Header-Name =~ /pattern/modifiers
           Specify  a rule.  "NAME_OF_RULE" is the name of the rule to be used, "Header-Name" is the name of the
           MIME header to check, and "/pattern/modifiers" is the Perl regular expression to match against this.

           Note that in a message of multiple parts, each header will be checked against the pattern separately.
           In other words, if multiple parts have a 'Content-Type' header, each header's value  will  be  tested
           individually as a separate string.

           Header names are considered case-insensitive.

           The  header  values  are  normally  cleaned  up  a little; for example, whitespace around the newline
           character in "folded" headers will be replaced with a single space.  Append ":raw" to the header name
           to retrieve the raw, undecoded value, including pristine whitespace, instead.

perl v5.22.1                                       2021-03-29             Mail::SpamAssas...gin::MIMEHeader(3pm)