Contributed by Marc Silver.
fetchmail is a full-featured IMAP and POP client which
allows users to automatically download mail from remote IMAP and POP servers and
save it into local mailboxes; there it can be accessed more easily. fetchmail can be installed using the mail/fetchmail port, and offers various features, some of which
include:
-
Support of POP3, APOP, KPOP, IMAP, ETRN and ODMR protocols.
-
Ability to forward mail using SMTP, which allows
filtering, forwarding, and aliasing to function normally.
-
May be run in daemon mode to check periodically for new messages.
-
Can retrieve multiple mailboxes and forward them based on configuration, to different
local users.
While it is outside the scope of this document to explain all of fetchmail's features, some basic features will be explained. The
fetchmail utility requires a configuration file known as .fetchmailrc, in order to run correctly. This file includes server
information as well as login credentials. Due to the sensitive nature of the contents of
this file, it is advisable to make it readable only by the owner, with the following
command:
% chmod 600 .fetchmailrc
The following .fetchmailrc serves as an example for
downloading a single user mailbox using POP. It tells
fetchmail to connect to example.com
using a username of joesoap and a password of XXX. This example assumes that the user joesoap is also a user on the local system.
poll example.com protocol pop3 username "joesoap" password "XXX"
The next example connects to multiple POP and
IMAP servers and redirects to different local
usernames where applicable:
poll example.com proto pop3:
user "joesoap", with password "XXX", is "jsoap" here;
user "andrea", with password "XXXX";
poll example2.net proto imap:
user "john", with password "XXXXX", is "myth" here;
The fetchmail utility can be run in daemon mode by running
it with the -d flag, followed by the interval (in seconds)
that fetchmail should poll servers listed in the .fetchmailrc file. The following example would cause fetchmail to poll every 600 seconds:
% fetchmail -d 600
More information on fetchmail can be found at https://fetchmail.berlios.de/.
