Free Email Clients
Email software supporting POP3, IMAP, SMTP etc
Free Email Clients
The freeware on this page allow you to collect or download your email from your mail server or Internet Service Provider (ISP) to your own computer using a facility (protocol) called POP3, so that you can read it and reply to it at your leisure, offline. Some of the email software listed also support another protocol called IMAP which allows you to read the email directly on your mail server, reply to it, delete it, move it to another folder, organise your mail into folders, etc, without actually keeping a copy of the mail on your own machine.
Beside collecting your email and replying to it, these programs also provide facilities for you to create folders for your messages so that you can organize them better. Most of them also let you set email filters, where you can move messages to selected folders or delete them, according to words or phrases occur in the incoming email. A subset of such filters are spam filters. Email clients with something called Bayesian spam filters can be trained to understand what is spam and what is not. Bayesian filters are trained when you classify your incoming mail as either spam or or non-spam. Eventually, when enough samples are provided, the program will be able to figure out by itself whether a new message entering the mail box is spam or not. Other facilities provided by email programs include the ability to send your own messages or reply to them. Some of the software will allow you to send mail using some authenticated protocol, such as is required by some ISPs or mail server.
(If you find yourself swamped by spam, so that your email client's built-in filters are not sufficient to protect you,
an alternative is to use the services of a spam filtering service like the commercial
SPAMfighter.
Such services learn from mail marked by spam by users all over the world, so that it tends to be able to recognize spam out of the box, as compared
to your own spam filters which you may have to configure/train. They have many other useful features too, of course, including recovering mail wrongly
marked as spam, blacklisting/whitelisting certain senders, the ability to block messages written in languages you don't understand, etc.)
If you are looking for an online email service, please see the Free Web Email, Email Forwarding or Redirection page instead.
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Disclaimer
The information provided on this page comes without any warranty whatsoever. Use it at your own risk. Just because a program, book, document or service is listed here or has a good review does not mean that I endorse or approve of the program or of any of its contents. All the other standard disclaimers also apply.
Free Email Software - Read Your E-mail Offline
- Koma-Mail (Windows)

Koma-Mail is a Windows e-mail client that features POP3, IMAP, SMTP, WebDAV, SSL and APOP. It has a built-in RSS viewer, contact management facilities and a calendar. You can compose and view HTML emails (I think it uses the Windows Internet Explorer's rendering engine), and the email client blocks ActiveX and scripts from executing (for security reasons) although you can't block web bugs (ie, HTML mail with images located on some web server elsewhere, allowing the senders to know that you've opened their message) unless you use the offline mode. It comes with a Bayesian spam filter, a word-based spam filter, has email white listing support, supports multiple mail accounts, etc.
- Thunderbird (Windows, Linux, Mac OS X)
From the organization that gave us the well-known Firefox browser comes Thunderbird. This open source email application works on a wide variety of operating systems, including Windows, Linux and Mac OS X. Features include the ability to quickly see all the unread email in your folders, tagging of your email with descriptive text like "To Do", "Important" and "Later" (etc), a message history so that you can move back and forth through the list of email messages you have accessed (like a web browser's back and forward buttons), a search facility to look for text in the e-mail on your system, phishing protection, automatic blocking of images in incoming mail to protect against web beacons, junk mail filters, message templates, and so on.
- Popcorn (Windows)
This open source email client is a lightweight and simple program for Windows that can be installed either on your desktop or even a USB flash drive. It handles multiple email accounts, supports encrypted email connections via SSL, needs no installation, is immune to HTML viruses and trojans (since it does not display HTML), provides the ability for you to save attachments, etc. This program is primarily designed for portable use - that is, you can simply put it into a USB flash drive and use it from any computer. It is handy also if you want to simply log into your email account and delete all the spam messages without downloading anything. The software allows you to view all the messages in your box, and only download messages you want, deleting others. You can also download mail without deleting it on your mail server.
- Eudora (Windows, Mac OS X)
Eudora used to be a very popular email client that is no longer being developed, although an open source version based on Thunderbird (see elsewhere on this page) is being worked on. The open source version will not have the same feature set as the original. This freeware email client is available for both Mac OS X and Windows and includes the ability for you to organise your mail into folders, search your email messages, access POP3 and IMAP mailboxes, use mail filters, have your messages automatically spell-checked for errors, use an address book, have automatic name and address completion when you start typing a recipient name, personalities where you define different email addresses and names to use for different email messages, SSL support, etc.
- Pegasus Mail (Windows, MS-DOS)
Pegasus Mail supports POP3 and IMAP mailboxes, multiple (different) people using the same copy of the program, Secure Socket Layer (SSL) encrypted email, etc. The program works on Windows and DOS.
- Alpine (Windows, Mac OS X, Linux, BSD, etc)
Alpine is the successor to Pine (which was an old email client used on many Unix-based systems). It has a text user interface and is distributed under the terms of the Apache License Version 2.0. The program runs on Windows, Mac OS X, Linux, the BSDs, the Nokia N800, and other Unix-type systems. You can also run it as a web application.
- Courier (Windows 9x, 2000 and XP only)
Courier works on Windows 9x, 2000 and XP (but not Vista). It supports multiple email accounts, POP and IMAP mail boxes, HTML email (which you can turn off if you want), colour tags to mark and organize your email messages, mailing list support, auto address completion, mail templates, mail filtering and anti-spam tools, etc.
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