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