Question : Interspire Email Marketer

I am finding that all the email campaign places are SooooOOO expensive and since I do not want to use the SMTP option& (ISP) and I do have many emails "bulk"...

Has anyone heard of PHP and sending emails?

I have found a company that seems to have BIG names who use their software that uses PHP (or at least I think that this is the case). You can review them here: http://www.interspire.com/emailmarketer/index.php

What do you think or know about this? If you use PHP emailing is your ISP also tied in, some think that it is not& but that does not seem right?? Is it?

Anyone use this and or know of any pitfalls of such software?

Wait I am now confussed, is this the same as regular SMTP eail sending becuase I just found the following on thier site?? Can someone make me understand?? Sorry I am new at this and I am LOST!

..."Integration With SMTP.com
If you have multiple clients but don't have your own SMTP mail server then you'll appreciate our partnership with SMTP.com which gives you an affordable, fully managed mail server to use when sending your clients email campaigns.

Open Source PHP Code
Source code (excluding license validation) is unencrypted and can be modified as required"....

Answer : Interspire Email Marketer

MAIL = SMTP

PHP is a web programming language, which can also talk SMTP if you program it to do so, as can C programs, Perl scripts, python scritps etc.