How to send emails via smtp?

Question

PHP

I have a server running xampp on it, and in xampp a site, here's how to send emails, writes something about smtp port 25?

Answer 1

1. Something is what? That's where the answer to your question is.
2. xampp - LAN software, are you asking about LAN? Then it is unlikely that sending letters will work there, even through smtp, even through something else