I’m looking to build an email notification system using codeigniter. Now the system in question is one of a 2nd hand online store. For example say person A would like a chair. When they search the system and nothing appears I would like them to subscribe to any notification regarding the chair. So when person B uploads a chair to be sold then everyone that subscribed to these notifications will be notified via email. This is what I’m looking to build, which for the most part is fairly easy.

I’m looking to build an email notification system using codeigniter. Now the system in question is one of a 2nd hand online store. For example say person A would like a chair. When they search the system and nothing appears I would like them to subscribe to any notification regarding the chair. So when person B uploads a chair to be sold then everyone that subscribed to these notifications will be notified via email. This is what I’m looking to build, which for the most part is fairly easy.

I’m looking to build an email notification system using codeigniter. Now the system in question is one of a 2nd hand online store. For example say person A would like a chair. When they search the system and nothing appears I would like them to subscribe to any notification regarding the chair. So when person B uploads a chair to be sold then everyone that subscribed to these notifications will be notified via email. This is what I’m looking to build, which for the most part is fairly easy.

I’m sorry if this has been asked but I’m not quite sure how to search for it. I’m having a bit of trouble understanding how mail() works in PHP. The way I see it, using that function, I can send e-mails from any user on my mail server – existent or not, without needing any credentials or anything. I doubt the guys from PHP would let this be the way I think it is and I also suspect that this has something to do with the fact that e-mails I send from my mail server go straight into the spam folders on other mailing services (gmail, yahoo etc.)