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.IX Title "Mail::SpamAssassin::Plugin::HeaderEval 3"
.TH Mail::SpamAssassin::Plugin::HeaderEval 3 2025-12-13 "perl v5.42.0" "User Contributed Perl Documentation"
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.SH NAME
Mail::SpamAssassin::Plugin::HeaderEval \- Plugin for evaluating header fields.
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\&  use Mail::SpamAssassin::Plugin::HeaderEval;
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
The \f(CW\*(C`Mail::SpamAssassin::Plugin::HeaderEval\*(C'\fR module provides functionality
for evaluating email header fields against certain criteria in SpamAssassin.
.IP check_for_fake_aol_relay_in_rcvd 4
.IX Item "check_for_fake_aol_relay_in_rcvd"
Check if a relay present in Received header is a forged AOL header.
.IP check_illegal_chars 4
.IX Item "check_illegal_chars"
Check for 8\-bit and other illegal characters that should be MIME encoded
.IP check_for_forged_hotmail_received_headers 4
.IX Item "check_for_forged_hotmail_received_headers"
Check for forged Hotmail received headers
.IP check_for_no_forged_hotmail_received_headers 4
.IX Item "check_for_no_forged_hotmail_received_headers"
Check for semi\-forged Hotmail received headers
.IP check_for_forged_eudoramail_received_headers 4
.IX Item "check_for_forged_eudoramail_received_headers"
Check for forged Eudora mail received headers
.IP check_for_forged_yahoo_received_headers 4
.IX Item "check_for_forged_yahoo_received_headers"
Check for forged Yahoo received headers
.IP check_for_forged_juno_received_headers 4
.IX Item "check_for_forged_juno_received_headers"
Check for forged Juno received headers
.IP check_for_forged_gmail_received_headers 4
.IX Item "check_for_forged_gmail_received_headers"
Check for forged Gmail received headers
.IP check_for_matching_env_and_hdr_from 4
.IX Item "check_for_matching_env_and_hdr_from"
Check if EnvelopeFrom and From headers match
.IP sorted_recipients 4
.IX Item "sorted_recipients"
Check if recipients are sorted
.IP similar_recipients 4
.IX Item "similar_recipients"
Check if recipients are similar
.IP check_for_missing_to_header 4
.IX Item "check_for_missing_to_header"
Check if To: header is missing
.IP subject_is_all_caps 4
.IX Item "subject_is_all_caps"
Check if Subject: header is all uppercase
.IP check_for_to_in_subject 4
.IX Item "check_for_to_in_subject"
Check if To: header value is present in the email Subject
.IP check_outlook_message_id 4
.IX Item "check_outlook_message_id"
Check if Message\-ID header has been generated by Microsoft Outlook
.IP check_messageid_not_usable 4
.IX Item "check_messageid_not_usable"
Check for invalid Message\-ID header
.IP check_invalid_from 4
.IX Item "check_invalid_from"
Check if From: address is not valid
.IP check_invalid_sender 4
.IX Item "check_invalid_sender"
Check if Sender header address is not valid
.IP check_invalid_replyto 4
.IX Item "check_invalid_replyto"
Check if Reply\-To header address is not valid