Xref: utzoo comp.mail.sendmail:3454 comp.mail.headers:703 comp.mail.misc:5837 gnu.emacs.help:2476 gnu.emacs.vm.bug:402 gnu.emacs.vm.info:207 news.software.nn:2131 Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!sdd.hp.com!caen!sol.ctr.columbia.edu!trantor.harris-atd.com!x102a!mwills From: mwills@x102a (wills ms 01309) Newsgroups: comp.mail.sendmail,comp.mail,comp.mail.headers,comp.mail.misc,gnu.emacs.help,gnu.emacs.vm.bug,gnu.emacs.vm.info,news.software.nn Subject: Re: Correcting/Augmenting Mail Headers (was: User setting From: address in sendmail input) Message-ID: <6634@trantor.harris-atd.com> Date: 29 Jun 91 17:25:02 GMT References: <1991Jun20.022606.1680@shaman.com> Sender: news@trantor.harris-atd.com Reply-To: mwills@x102a.ess.harris.com (M. Scott Wills) Organization: Harris Corporation, Government Aerospace Systems Division. Lines: 40 barnett@grymoire.crd.ge.com (Bruce Barnett) writes: >In article <1991Jun20.022606.1680@shaman.com> jiro@shaman.com (Jiro Nakamura) writes: >> In article fwp1@CC.MsState.Edu >> (Frank Peters) writes: >>> I realize how easy it is to spoof via smtp. But I would have thought this >> Great security hazard. >We use this bug to work around another bug when sending >mail inside GNU emacs. But since it doesn't *add* any additional security ^^^^^^^^^---- NN and GNU emacs mail users, please read on. At my site, it is necessary to override the default Reply-To: field because my mailhost does not add the domain part. It just sends user@host (i.e. not user@host.harris.ess.com). The fellow who suggested that I correct this manually (via nn "mail-headers" and "new-headers" variables) also pointed out an optional (?) Return-receipt-to: field which automatically sends an end-to-end acknowledgement when the mail is delivered (or perhaps when it is read?). Is this supported by all smtp servers? Although I recognize the spoofing potential, the Reply-to: and Return-receipt-to: fields are extremely valuable when used correctly. I also realize that proper system configuration would take care of this, but in the absence of a sendmail literate sysadmin, I must do this myself. My question is this: How can I enable these features (Reply-to: header and end-to-end ack) in all my mail, rather than just mail and postings sent from inside "nn" (e.g. GNU emacs rmail and vm)? Is there a comp.mail.headers FAQ or internet RFC which describes other header options available to the user? -- - Scott ------------------------------------------------------------------------------ M. Scott Wills, Mail Stop: 102-4844 INTERNET: mwills@x102a.ess.harris.com Harris Corporation UUCP: uunet!x102a!mwills Government Aerospace Systems Division CCMail: harris.mwills01 P.O. Box 94000 FAX: 407-729-3211 Melbourne, Florida 32902 Voice: 407-729-3283 ------------------------------------------------------------------------------