Sending emails with SMTP through the smtplib library

In this section, we will learn about the SMTP protocol and introduce smtplib, a Python module that's used to send emails. We will also demonstrate how to send different types of email, such as simple text messages, emails with attachments, and emails with HTML content. We will also explore how to work with emails with SMTP authentication in Python 3.7.

SMTP protocol

SMTP is a set of rules for the transmission of messages from their origin to the destination and is used to transmit email messages to mail servers. SMTP uses port 25 to send or transmit mail messages. Email servers need to have this port open to listen for incoming connections.

In the connection between...