Mail::SpamAssassin::PlUser:ContributeMail::SpamAssassin::Plugin::MIMEEval(3pm)
NAME
Mail::SpamAssassin::Plugin::MIMEEval - perform various tests against
MIME structure and body
SYNOPSIS
loadplugin Mail::SpamAssassin::Plugin::MIMEEval
body NAME_OF_RULE eval:check_for_mime
body NAME_OF_RULE eval:check_for_mime_html
body NAME_OF_RULE eval:check_for_mime_html_only
body NAME_OF_RULE eval:check_mime_multipart_ratio
body NAME_OF_RULE eval:check_msg_parse_flags
body NAME_OF_RULE eval:check_for_ascii_text_illegal
body NAME_OF_RULE eval:check_abundant_unicode_ratio
body NAME_OF_RULE eval:check_for_faraway_charset
body NAME_OF_RULE eval:check_for_uppercase
body NAME_OF_RULE eval:check_ma_non_text
body NAME_OF_RULE eval:check_base64_length
body NAME_OF_RULE eval:check_qp_ratio
DESCRIPTION
Perform various tests against MIME structure and body.
has_check_for_ascii_text_illegal
Adds capability check for "if can()" for
check_for_ascii_text_illegal
check_for_ascii_text_illegal
If a MIME part claims to be text/plain or
text/plain;charset=us-ascii and the Content-Transfer-Encoding is
7bit (either explicitly or by default), then we should enforce the
actual text being only TAB, NL, SPACE through TILDE, i.e. all 7bit
characters excluding NO-WS-CTL (per RFC-2822).
All mainstream MTA's get this right.
has_check_abundant_unicode_ratio
Adds capability check for "if can()" for
check_abundant_unicode_ratio
check_abundant_unicode_ratio
A MIME part claiming to be text/plain and containing Unicode
characters must be encoded as quoted-printable or base64, or use
UTF data coding (typically with 8bit encoding). Any message in
7bit or 8bit encoding containing (HTML) Unicode entities will not
render them as Unicode, but literally.
Thus a few such sequences might occur on a mailing list of
developers discussing such characters, but a message with a high
density of such characters is likely spam.
check_for_mime
Check for various MIME properties.
Use in rules such as:
rawbody MIME_BASE64 eval:check_for_mime('mime_base64_count')
describe MIME_BASE64 Includes a base64 attachment
mime_base64_count
mime_base64_encoded_text
mime_body_html_count
mime_body_text_count
mime_faraway_charset
mime_missing_boundary
mime_multipart_alternative
mime_multipart_ratio
mime_qp_count
mime_qp_long_line
mime_qp_ratio
mime_ascii_text_illegal
mime_text_unicode_ratio
check_for_mime_html_only
Check for messages containing only text/html body parts
has_check_qp_ratio
Adds capability check for "if can()" for check_qp_ratio
check_qp_ratio
Takes a min ratio to use in eval to see if there is an spamminess
to the ratio of quoted printable to total bytes in an email.
perl v5.34.0 202Mail::SpamAssassin::Plugin::MIMEEval(3pm)
Generated by dwww version 1.14 on Sat Jun 13 12:12:44 CEST 2026.