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* Do you know what SMTP is?

The Simple Mail Transfer Protocol, or short SMTP, is a popular email protocol that is used for sending email messages from one email account to another via the Internet. It is known to be a part of the application layer of the TCP/IP protocol. Its application as an email protocol sets the rules for the easy exchange of information between email clients and accounts. So, as a result, thanks to SMTP, widespread email delivery is possible.

You can utilize several SMTP ports as communication endpoints to send emails. They are the following:

Port 25
Port 465
Port 587
Port 2525

A long time ago, SMTP (Simple Mail Transfer Protocol) was able to use only port 25. Yet, now it is capable of utilizing more port numbers, which are 465, 587, and 2525.

If you are curious to learn more about this topic, we recommend an article with more information about SMTP!