A question about emailing with php

[habbardone]

Hi,
The emailing company Aweber.com knows which
emails that are sent are by their mail server.

How do they do that ?

Is this something that I can do with php?

If so, what do I need to do in order to get the
information about opened or not ?

Thanks.

[Kudose]

You can check the mail logs with PHP using the file functions if you have permission to read them. i.e. [man]file_get_contents[/man] Knowing if an email was opened requires a callback to your server, usually via image. Most email clients disable remote images and script by default.