Free mail notification software for linux

Mail Notification is a status icon (aka tray icon) that informs you if you have new mail.
Mail Notification works with system trays implementing the freedesktop.org System Tray Specification, such as the GNOME Panel Notification Area, the Xfce Notification Area and the KDE System Tray.
Main features:
- multiple mailbox support
- mbox, MH, Maildir, Sylpheed, POP3, IMAP and Gmail support
- SASL authentication support
- APOP authentication support
- SSL/TLS support
- automatic detection of mailbox format
- immediate notification (the status icon is updated within seconds after a mailbox changes)
- a mail summary
- HIG 2.0 compliance.

Reliable Response Notification provides guaranteed delivery of critical messages to a wide range of devices. The project guarantees that every emergency will have one, and only one, person responding and taking charge of the recovery.
For integrated services, like some network monitors, help-desk packages, and security suites, Reliable Response Notification allows the user to update records via their mobile devices. It is available as either a standalone server or as a hosted service.
Enhancements:
- The product supports three types of groups: broadcast, escalation and on-call.
- Many devices are supported, including email, SMS, text-to-speech, Jabber, GTalk, SameTime IM, and alphanumeric pagers.
- Integrations for a number of packages are available.
- There is an easy system to add new integrations as needed.

Yahoo! Mail Notifier is an extension which notifies you when new messages arrive in your Yahoo mailbox.
Notification options include: customizable sound, notification alert, status bar and toolbar icon.
Also allows the user to map different mouse buttons to open Yahoo Mail in different tabs,windows,etc.
System requirements:
- Firefox 0.9.x - 3.0a3 ALL
- Mozilla 1.7 - 1.8 ALL
- SeaMonkey 1.0 - 1.5a ALL
Version restrictions:
1. The extension uses the Yahoo! Companion feed to check for new mail so only new messages received since last viewing your Yahoo Mailbox will be counted as new.
2. On some accounts, Yahoo! never updates the companion feed page when new mail arrives (you never see new mail notifications). This is a bug with your Yahoo account so contact Yahoo to have it fixed. If you dont get new mail notification when installing Yahoos official toolbar (toolbar.yahoo.com), then you are experiencing this problem.
3. Only the username marked as default will be checked for new mail. The extension can only check for mail if the user remains logged in. Logging out on a Yahoo page while the extension is actively checking will cause the extension to log back in to the default userss account the next time it checks for email. This is also true if you have sinced logged into another Yahoo account on a Yahoo page. This is done to prevent the extension from getting into a weird state where it thinks one user is logged in when in fact another user is. This will be fixed more thoroughly when multi-user support is added. If you dont want this to occur, use the extensions "log out" command instead of logging out on the Yahoo page which will log the default user out and stop checking for new mail.
4. Choosing a sound file to play on new mail has been reported to not work on Macs. The default sound is said to work. I dont have a Mac so I cant test this.
5. Im told that installing this extension in FreeBSD Firefox causes Firefox to crash. Im unable to test this as I dont have FreeBSD. Generally though all browser crashes should be reported to Mozilla since this is extension should be incapable of crashing the browser unless the browser is buggy.

Mozilla New Mail Icon is an extension which displays an icon in the system tray when new mail arrives in your Mozilla or Mozilla Thunderbird .

Mozilla New Mail Icon supports the standard (FreeDesktop.org) system tray, as used by GNOME, KDE and IceWM.

Gmail Manager extension allwos you to manage multiple Gmail accounts and receive new mail notifications.

Displays your account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets

Mail::Field is a base class for manipulation of mail header fields.

SYNOPSIS

use Mail::Field;

$field = Mail::Field->new(Subject, some subject text);
print $field->tag,": ",$field->stringify,"n";

$field = Mail::Field->subject(some subject text);

Mail::Field is a base class for packages that create and manipulate fields from Email (and MIME) headers. Each different field will have its own sub-class, defining its own interface.

This document describes the minimum interface that each sub-class should provide, and also guidlines on how the field specific interface should be defined.

PloneSubscription provides a tool supporting different levels of subscription and notification

This product allows users to manage their subscriptions and to administrators manage group-wide subscriptions.

Mail::SendEasy can send plain/html e-mails through SMTP servers (platform independent). Supports SMTP authentication and attachments.

This modules will send in a easy way e-mails, and doesnt have dependencies. Soo, you dont need to install libnet.
It supports SMTP authentication and attachments.

USAGE:

OO

use Mail::SendEasy ;

my $mail = new Mail::SendEasy(
smtp => localhost ,
user => foo ,
pass => 123 ,
) ;

my $status = $mail->send(
from => sender@foo.com ,
from_title => Foo Name ,
reply => re@foo.com ,
error => error@foo.com ,
to => recp@domain.foo ,
cc => recpcopy@domain.foo ,
subject => "MAIL Test" ,
msg => "The Plain Msg..." ,
html => "The HTML Msg..." ,
msgid => "0101" ,
) ;

if (!$status) { print $mail->error ;}

STRUCTURED

use Mail::SendEasy ;

my $status = Mail::SendEasy::send(
smtp => localhost ,
user => foo ,
pass => 123 ,
from => sender@foo.com ,
from_title => Foo Name ,
reply => re@foo.com ,
error => error@foo.com ,
to => recp@domain.foo ,
cc => recpcopy@domain.foo ,
subject => "MAIL Test" ,
msg => "The Plain Msg..." ,
html => "The HTML Msg..." ,
msgid => "0101" ,
) ;

if (!$status) { Mail::SendEasy::error ;}