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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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A Domain Alias (or Park Domain) allows additional domain names to all lead to the exact same locations on your original website. For example, if you are hosting your domain name “original.com” and added a Domain Alias for “alias.com”, then http://www.original.com and http://www.alias.com would take a visitor to the exact same pages of your original.com website.

http://original.com/somefile.html would bring someone to the exact same page as http://alias.com/somefile.html. With a Domain Alias, the URL in the address bar of the user’s browser stays exactly as they typed it.

Domain Aliases have all the properties of a regular domain hosting account in terms of DNS and mail. The only difference is that the Domain Alias has no files (web pages) of it’s own. Instead it uses the files of the aliased domain name.

Domain Alias is the same as Park domain, some web host prefer to use the term Domain alias over the other.  Cpanel host however, uses the term Park domain.

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.