Path: utzoo!attcan!uunet!mcsun!ukc!acorn!cs.glasgow.ac.uk!daemon From: C.R.Ritson@newcastle.ac.uk (Chris Ritson) Newsgroups: mail.uk-sendmail-workers,comp.mail.sendmail Subject: Thats the ticket... Message-ID: Date: 14 Sep 90 12:20:38 GMT Sender: daemon@cs.glasgow.ac.uk Lines: 17 Approved: usenet@cs.glasgow.ac.uk X-Mailer: ELM [version 2.3 PL4] Can someone (briefly) tell me about the following SMTP dialog. This is from memory and may not be exactly right, but I hope you can recognise it: TICK 123456789 250 123456789 That's the ticket!! Is this some way of avoiding the very easy method of spoofing mail by making your own telnet connection to a sendmail daemon and typing at it. As you have probably guessed, we have a few jokers that like to do this and would like to make it harder to do without being found. Chris Ritson -- PHONE: +44 91 222 8175 Computing Laboratory, FAX : +44 91 222 8232 University of Newcastle upon Tyne, TELEX: uk+53654-UNINEW_G UK, NE1 7RU