[ Thanks to Jan
Stafford for this link. ]
“Can you offer some comparisons of such open source
e-mail alternatives as sendmail, gmail, fusemail and
Thunderbird?“McFarlane: For an enterprise messaging system,
you need three pieces of software: an MTA (Mail Transfer Agent), a
UA (User Agent) and a database. MTA = mail gateway; UA = client;
and, database = where the mail is stored.“Exchange, sendmail, postfix, etc are MTA servers. Exchange is
also an email database. Gmail, Thunderbird, Outlook, pine and elm
are MTA clients…”