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.IX Title "Mail::SpamAssassin::Plugin::MIMEEval 3"
.TH Mail::SpamAssassin::Plugin::MIMEEval 3 "2015-04-29" "perl v5.16.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.IP "has_check_for_ascii_text_illegal" 4
.IX Item "has_check_for_ascii_text_illegal"
Adds capability check for \*(L"if \fIcan()\fR\*(R" for check_for_ascii_text_illegal
.IP "check_for_ascii_text_illegal" 4
.IX Item "check_for_ascii_text_illegal"
If a \s-1MIME\s0 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 \s-1TAB, NL, SPACE\s0 through \s-1TILDE,\s0 i.e. all 7bit characters excluding NO-WS-CTL (per \s-1RFC\-2822\s0).
.Sp
All mainstream \s-1MTA\s0's get this right.
.IP "has_check_abundant_unicode_ratio" 4
.IX Item "has_check_abundant_unicode_ratio"
Adds capability check for \*(L"if \fIcan()\fR\*(R" for check_abundant_unicode_ratio
.IP "check_abundant_unicode_ratio" 4
.IX Item "check_abundant_unicode_ratio"
A \s-1MIME\s0 part claiming to be text/plain and containing Unicode characters must be encoded as quoted-printable or base64, or use \s-1UTF\s0 data coding (typically with 8bit encoding).  Any message in 7bit or 8bit encoding containing (\s-1HTML\s0) Unicode entities will not render them as Unicode, but literally.
.Sp
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.
.IP "has_check_qp_ratio" 4
.IX Item "has_check_qp_ratio"
Adds capability check for \*(L"if \fIcan()\fR\*(R" for check_qp_ratio
.IP "check_qp_ratio" 4
.IX Item "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.