Specifications
Chapter 4 Conguring and Managing Webmail 59
To use Webmail, a user must have an account on your mail server. Therefore, you must
have Mail service set up to oer Webmail.
Users log in to Webmail with the name and password they use for logging in to their
regular mail service. Webmail does not provide its own authentication. For more
information about mail service users, see Mail Service Administration.
When users log in to Webmail, their passwords are sent over the Internet in clear
text (not encrypted) unless the website is congured to use SSL. For instructions on
conguring SSL for website, see “Enabling Secure Sockets Layer (SSL)” on page 42.
More information about Webmail is available in the SquirrelMail user manual, located
at http://squirrelmail.org/wiki/DocumentationHome.
Webmail and Your Mail Server
Webmail relies on your mail server to provide mail service. Webmail merely provides
access to mail service through a web browser. Webmail cannot provide mail service
independently of a mail server.
Webmail uses the mail service of your Mac OS X Server by default. You can designate a
dierent mail server using Terminal and UNIX command-line tools. For instructions, see
“Conguring Webmail” on page 60.
Webmail Protocols
Webmail uses the following standard mail protocols that your mail server must
support:
Internet Message Access Protocol (IMAP), for retrieving incoming mail Â
Simple Mail Transfer Protocol (SMTP), for exchanging mail with other mail servers Â
(sending outgoing mail and receiving incoming mail)
The SquirrelMail conguration script authorizes setting the IMAP server type:
The setting  macosx = Mac OS X MailServer refers to the older Apple MailServer in
Mac OS X Server v10.2.
In Mac OS X v10.3 and later, the correct setting (set by default) is  cyrus = Cyrus
IMAP Server.
Webmail does not support retrieving incoming mail using Post Oce Protocol (POP).
Even if your mail server supports POP, Webmail does not.