Sending e-mails with SMTP

We can send an e-mail from a Python script by using smtplib and e-mail packages. The smtplib module provides an SMTP objects which is used for sending mail by using either an SMTP or an Extended SMTP (ESMTP) protocol. The e-mail module helps us in constructing the e-mail messages with the help of the various header information and attachments. This module conforms to the Internet Message Format (IMF) described at http://tools.ietf.org/html/rfc2822.html.

Composing an e-mail message

Let us construct the e-mail message by using classes from the email module. The email.mime module provides classes for creating the e-mail and MIME objects from scratch. MIME is an acronym for Multi-purpose Internet Mail Extensions. This is an extension of the original Internet e-mail protocol. This is widely used for exchanging different kinds of data files, such as audio, video, images, applications, and so on.

Many classes have been derived from the MIME base class. We will use an SMTP...