some packages like these: The following dialog illustrates how a client and server can start a TLS session: S: <waits for="" connection="" on="" tcp="" port="" 25=""> C: <opens connection=""> S: 220 mail.imc.org SMTP service ready C: EHLO mail.ietf.org S: 250-mail.imc.org offers a warm hug of welcome S: 250 STARTTLS asked 30 May '13, 20:38  vivianlawrence edited 30 May '13, 20:39 |
2 Answers:
Umm, C: is Client and S: is Server, perhaps? answered 30 May '13, 21:08  griff |
That output is from RFC 2487. It's kind of funny to say this, but as per RFC 2487 section 6, the letters S and C refer to an SMTP Server and an SMTP Client. answered 31 May '13, 20:16  Quadratic edited 31 May '13, 21:51  cmaynard ♦♦ |
Oh it should be. Something must be wrong with my head. I was thinking C means content, and that confused me a lot.