E-mail-2

• Model:

  • e-mail are handled at the level of organizations : Cern, IBM, …
  • each e-mail for an organization is handled by a relay MTA (Message Transfer Agent)
  • MTAs exchanges e-mails between themselves with SMTP
  • user accesses e-mail with an UA (User Agent) (e.g. Eudora)
    • UA can send e-mails via a local MTA or directly with smtp
    • UA can read e-mail in a local spool or via POP (Post Office Protocol) or IMAP (Internet Message Access Protocol)
  • SMTP, POP and IMAP use a TCP transport (ports 25,110,143)

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