Presentation taxonomy for
Central Ohio Linux Users Group
meeting - February 24, 1999
by Phil Hunter
   hunter@owlriver.com
      614-221-0695


1.	Mail composing agent (MCA) 
-----------------------------
  (talk TO smtp) -- port 25
	elm 
	mailx
	Mail
	mutt
	pine
	perl (NET:mail ...)


1a.	Graphical MCA
-----------------------------
	Pegasus
	MS Exchange
	NS mail


2.	Enhanced mail handlers (outbound)
-----------------------------
	pgp - sign, authenticate, encrypt
	procmail
	vacation


3.	MTA (Mail Transfer Agent)
-----------------------------
  (listen and talk smtp) -- port 25
	qmail
	sendmail
	smail
	IBM PROFS
	Lotus ccMail
	MS Exchange Mail
	NS Messaging Server

(NO strong authentication)
(may re-write headers - RFC-822  address  headers)
	/etc/sendmail.cf
(also talks to DNS - MX records) -- port 53
(may enforce submitters list)
	/etc/mail/ip_allow
	/etc/mail/mail_allow


4.	MDA (Mail Delivery  Agent)
-----------------------------
  (listen smtp) -- AX_InetSockets port 25,
		 and possibly direct thru UnixSocket
	deliver
	qmail
	sendmail
	smail
	IBM PROFS
	Lotus ccMail
	MS Exchange Mail
	NS Messaging Server

(may relay, enforce anti UCE, set)
	/etc/mail/relay_allow
	/etc/sendmail.cw (for whom receive lists)
(also talks to DNS - MX records - for further relay) -- port 53

  /etc/aliases
  ~/.forward


5.	Mail spool
-----------------------------
  (mail placed in mail spool file)
	convention /var/spool/mail/(userid)


6.	POP/IMAP servers
-----------------------------
  (listen ipop[23]d, imapd)  -- port 109, 110, 143)
	UW imapd
	UW ipop[23]d
	Cyrus imapd
	qpopper

(looks for mail placed in mail spool file)
	/var/spool/mail/(userid)
	... and ~/mail
	... and ...


7.	Enhanced mail handlers (transfer, filtering)
-----------------------------
	fetchmail
	procmail
	pgp - authenticate, decrypt


8.	normal mail user agents  (talk TO a POP/IMAP server) 
-----------------------------
 -- port 109, 140, 143
	elm 
	mutt
	pine 
	(x)emacs/gnus
	mailx


8a.	Graphical MUA
-----------------------------
	Pegasus
	MS Exchange
	NS mail


9.	Strays
-----------------------------
	pgp
	ssh
	uucp


10.	Issues
-----------------------------
Authentication
Non-repudiation
Privacy
Tamper-detection


11.	Standards
-----------------------------
       SMTP/ESMTP:
            RFC 821, RFC 1869, RFC 1652, RFC 1870,  RFC1983,  RFC
            1985

       mail:
            RFC 822

       POP2:
            RFC 937

       POP3:
            RFC 1081, RFC 1225, RFC 1460, RFC 1725, RFC 1939

       APOP:
            RFC 1460, RFC 1725, RFC 1939

       RPOP:
            RFC 1081, RFC 1225

       IMAP2/IMAP2BIS:
            RFC 1176, RFC 1732

       IMAP4:
            RFC 1730, RFC 1731, RFC 1732, RFC 2060, RFC 2061

       ETRN:
            RFC 1985

       OTP: RFC 1938



(COLUG_990224.txt)

... in http://bopper.wcbe.org/~COLUG/9902mtg/COLUG9902.txt