system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is SMTP?

I am currently doing a research for my boss re: email campaigns and has come across the term called SMTP. I tried to understand what Wikipedia is trying to explain, but I just can't quite grasp it. Help?
gpt
STMP stands for Simple Mail Transfer Protocol. It is the common language (protocol) used by both email clients and servers to understand each other and be able to send emails. Imagine that you were building a new Outlook application. You would need to "speak" SMTP if you were to communicate with the email exchange server. Otherwise, it would not understand you. Pretty much like when you go to a foreign country where no one speaks English and you have to learn their language.

Please note that SMTP is only used for sending emails. There are other protocols for receiving emails, such as POP.