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In this article Xiaobian for you to introduce in detail "what is the syntax of SMTP in Python3", the content is detailed, the steps are clear, and the details are handled properly. I hope this article "what is the syntax of SMTP in Python3" can help you solve your doubts.

SMTP (Simple Mail Transfer Protocol), or simple Mail transfer Protocol, is a set of rules for sending messages from source to destination, which controls the way letters are transferred.

Python's smtplib provides a convenient way to send e-mail. It simply encapsulates the smtp protocol.

The syntax for creating a SMTP object by Python is as follows:

Import smtplibsmtpObj = smtplib.SMTP ([host [, port [, local_hostname])

Parameter description:

Host: SMTP server host. You can specify the ip address or domain name of the host, such as runoob.com, which is an optional parameter.

Port: if you provide the host parameter, you need to specify the port number used by the SMTP service. Typically, the SMTP port number is 25.

Local_hostname: if SMTP is on your local computer, you only need to specify the server address as localhost.

The Python SMTP object uses the sendmail method to send messages with the following syntax:

SMTP.sendmail (from_addr, to_addrs, msg [, mail_options, rcpt_options]

Parameter description:

From_addr: address of the sender of the mail.

To_addrs: list of strings, email address.

Msg: sending messa

Note here that the third parameter, msg, is a string that represents the message. We know that an email is generally composed of title, sender, recipient, email content, attachment, etc. When sending an email, we should pay attention to the format of msg. This format is defined in the smtp protocol.

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