Mail

The Comment Mail module allows an email to be sent to the site administrator(s) when new comments are posted. A link in the email allows quick approval, editing, deletion, and/or banning of the poster's IP address.

Drupal 6: This is being worked on in the issue queue currently. The patch in the issue is against the HEAD version of code. It mostly works except the approval and deleteban links aren't correct yet.

This module provides advanced email address checking. The core of Drupal, through the user module, only performs syntactical checking of user-entered email addresses, both during registration and account edition. This creates loads of problems when users incorrectly enter their address. First, they don't get any email from the site. If it happened during registration, they will not get their password. They will either bug the site admin or give up on the site altogether, both cases being a bad thing.

A news module that uses Send to deliver one or more nodes to a mailing list.

Because News uses the send and MLM frameworks, it is short and efficient. But it includes all of Send's feature list, including CiviCRM integration, message history and HTML formatting. You can deliver news to any of MLM's mailing lists.

This module requires Mime Mail, Send, and MLM.

Manage multiple mailing lists through pluggable backends.

Using plug-ins, this module provides an interface to subscribe, unsubscribe and post to mailing list backends. The intended purpose is to integrate existing mailing list solutions into a unified interface for subscribers.

This module was requires Mime Mail. It does not provide an interface to create or format messages, only the ability to distribute them to the list.

Note this bug if you are using Windows are you PHP server: http://bugs.php.net/bug.php?id=36496&edit=1
This is a simple webmail client for Drupal. With this module, you can read your IMAP accounts right from inside Drupal. You can also setup multiple accounts, reply and compose emails to anyone and you can send attachments when you have upload.module installed.

Integration of the roundcube webmail client in drupal

Mobile Media Blog allows you to post media via e-mail or mobile phone.
It integrates with Mailhandler [1] and saves the submitted text as node and attaches all files sent with it.

This module now integrates with CCK Filefield [4] / Imagefield [5].
That enables you to use Views and/or Imagecache for display.

You may choose to use the inline module [2] to display attached files automatically.
The mailalias module [3] allows your users to provide more than on e-mail address for posting.

The organic groups list manager (OG2List) module allows groups of users to have a mailing list managed as part of their organic group, a collection of users with common interests and shared content. Mail on the mailing list is archived in a forum and groups members can respond by email or they can respond in forums directly. Mailing list are one of the most effective and popular methods for group collaboration using the Internet.

The mailcommand module lets you send commands to a Drupal site that either has mailhandler or og2list installed.

The mail command module can be used to execute Drupal commands through email. This basic functionality can be extended by other modules. The og2list module uses this to allow users to subscribe to mailing lists. This is useful when group managers do not have access to web based connections.

Fixes the problem of bad email 'Return-Path' header settings which prevent email bounce backs going to the sender
of the email.