ignore references return-path lines precedence x-authentication-warning
ignore list-help list-subscribe list-unsubscribe list-post list-archive
ignore x-mimetrack priority x-priority importance x-mime-autoconverted
ignore references return-path lines precedence x-authentication-warning
ignore list-help list-subscribe list-unsubscribe list-post list-archive
ignore x-mimetrack priority x-priority importance x-mime-autoconverted