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The Anti-Spam SMTP Proxy (ASSP) server project is an Open Source platform-independent transparent SMTP proxy server that leverages numerous methodologies and technologies to both rigidly and adaptively identify spam. ASSP is easy to setup because it requires only minor changes to your Mail Transfer Agent (MTA).

This are part of the advantages of ASSP

1. Easy browser-based setup (optional).
2. Uses your existing message transport and existing SMTP server.
3. Works with Sendmail, qmail, Postfix, Imail, Exchange, Courier, Mercury, Lotus Notes, and all other standard SMTP servers.
4. Runs on Linux, Unix, Windows, OS X, OS/2, and more.
5. Automatically customizes to your site’s unique email profile.
6. Automatic whitelist — noone you email will ever be blocked.
7. Early Sender validation — Kills most spam before it ever reaches the server.
8. Senders receive immediate notification if mail is blocked but no erroneous bounces are ever generated.
9. Redlist keeps an address off the whitelist.
10. No-processing addresses pass through.
11. Makes use of honeypot type spambucket addresses to automatically recognize spam and update your spam database.
12. Bayesian filter intelligently classifies email into spam and non-spam.
13. Supports additional site-defined regular expressions to identify spam or non-spam email.
14. Can optionally block all non-whitelisted email (for anti-spam zelots).
15. Mime encoded and other camouflaged spam is also recognized.
16. Automatically maintains the spam and non-spam databases.
17. Accepts whitelist submissions and spam error reports by authorized email.
18. Optionally rejects executable attachments from non-whitelisted (or all) addresses.
19. Free (as in speech) software — Licensed under the GPL.
20. Practically no maintenance required.
21. Active user community and email list for support questions.
22. Source code included if you need to customize your installation.
23. Runs as a service in Windows NT / 2000.
24. Optionally blocks no mail but adds an email header and/or updates the message subject.
25. Optionally uses community-based spam statistics to identify hosts that are likely to send spam or non-spam mail.
26. In *nix environments can switch to non-root user. Also supports chroot jail.
27. Individual users can be configured to receive all mail.
28. Shows detailed analysis of spam rating process for specific messages.
29. Option to forward a copy of every rejected mail to an address.
30. Can block spam-bombs (when spammers forge your domain in the from field).
31. Keeps spam statistics for your site.
32. Detailed documentation.
33. Can listen on more than one smtp port.
34. And much more!

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NeoMail, Horde and SquirrelMail are 3 commonly free webmail client offer by most hosting company (limited to linux hosts only). 

1.  NeoMail
   Neomail has been discontinued due to long-standing security and stability issues, and the fact that the largest control panel vendor, cPanel, has also discontinued support for Neomail
2.  Horde
   I find Horde mail client (Internet Messaging Program or the IMP) is the best, It is written in PHP and provides webmail access to IMAP and POP3 accounts. It is included with cPanel and Plesk installations as a webmail client. It often integrates email, calendar, address book, notes, tasks, filters and a newsreader with cPanel.Check out screenshots here.
3. Squirrelmail
   The SquirrelMail client itself is a complete webmail system, but extra features are available in the form of plugins. A plugin allows non-standard features to be added to SquirrelMail, often without the need to modify the source code. There are over 200 third-party plugins available for download from the SquirrelMail website, and SquirrelMail ships with several “standard” or “core” plugins, allowing an administrator to add:
   • Spell checking (squirrelspell)
   • Mail filters (filters)
   • Web-based administration of SquirrelMail (administrator)
   • A calendar (calendar)
   • An interface to submit bug reports semi-automatically (bug_report)

About author : This original article is property of Top 10 Web Hosting (http://www.top10webhosting.com). List of best web hosting services company offering PHP and MySQL. Compare & save ! on web hosting fee.

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Installing a Php MySQL + Apache development environment was once very frustrating (especially on Windows Vista !) until XAMPP launched.

XAMPP is an easy to install Apache distribution containing MySQL, PHP and Perl. XAMPP is really very easy to install and to use - just download, extract and start. The best part is IT IS FREE.

I have only tried the Windows version and is already loved it ! The windows version works on Windows 98, NT, 2000, 2003, XP and Vista. This version contains: Apache, MySQL, PHP + PEAR, Perl, mod_php, mod_perl, mod_ssl, OpenSSL, phpMyAdmin, Webalizer, Mercury Mail Transport System for Win32 and NetWare Systems v3.32, Ming, JpGraph, FileZilla FTP Server, mcrypt, eAccelerator, SQLite, and WEB-DAV + mod_auth_mysql

Screen shots.

Why I like XAMPP so much ?

1. The installation is really easy on my Vista notebook, I do not have to handle the troublesome Vista User account control (UAC).
2. Installation comes with latest Apache 2.6, php 4 & 5, MySQL 5+
3. Zend optimer is included.
4. Switching between Php 4 and Php 5 is very simple.
5. Apache and MySQL can run as service of run adhoc.

About author : This original article is property of Top 10 Web Hosting (http://www.top10webhosting.com). List of best web hosting services company offering PHP and MySQL. Compare & save ! on web hosting fee.

Note : Please include author information if you wish to republish this article.