Internet Exchange Points (IXPs)

Scenario: Alice sends messageto Bob1) Alice composes a message“to” bob@someschool.edu2) Alice’s user agent sendsmessage to her mailserver; message placed inmessage queue3) Client side of SMTP opensTCP connection with Bob’smail server4) SMTP client sends Alice’smessage over the TCPconnection5) Bob’s mail server placesthe message in Bob’smailbox6) Bob invokes his useragent to read message1useragent2 3456useragent