Why you might need it
Many PHP developers utilize email in their code. The only PHP function that supports this is the mail() function. However, it does not expose any of the popular features that many email clients use nowadays like HTML-based emails and attachments. There are two proprietary development tools out there that have all the functionality built into easy to use classes: AspEmail(tm) and AspMail. Both of these programs are COM components only available on Windows. They are also a little pricey for smaller projects.
Since I do Linux development I have missed these tools for my PHP coding. So I built a version myself that implements the same methods (object calls) that the Windows-based components do. It is open source and the LGPL license allows you to place the class in your proprietary PHP projects.
Features
* Can send emails with multiple TOs, CCs, BCCs and REPLY-TOs
* Redundant SMTP servers
* Multipart/alternative emails for mail clients that do not read HTML email
* Support for 8bit, base64, binary, and quoted-printable encoding
* Uses the same methods as the very popular AspEmail active server (COM) component
* SMTP authentication
* Word wrap
* Address reset functions
* HTML email
* Tested on multiple SMTP servers: Sendmail, qmail, Postfix, Imail, Exchange, etc
* Works on any platform
* Flexible debugging
* Custom mail headers
* Multiple fs, string, and binary attachments (those from database, string, etc)
* Embedded image support
http://phpmailer.sourceforge.net/
