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Python email sending tutorial I searched out a lot when I searched on the website,But all said a lot of principles and then came out the implementation code,I tested sending emails with the code given without success,It took me a long time to find out why,This is all caused without a detailed environment debugging,So today I have a detailed tutorial,Step-by-step tutorial from environment debugging to code implementation,I hope to help those who are still struggling to find a solution but have not been able to solve it effectively.

smtp protocol

First understand smtp (Simple Mail Transfer Protocol). The mail transfer agent uses the smtp protocol to send emails to the recipient's mail server.smtp protocol can only be used to send mail,Cannot be used to receive mail,And most mail sending servers use smtp protocol. The default TCP port number for the smtp protocol is 25.

Environmental debugging

The above said is the mail sent using the smtp protocol,So you need to check whether your sender's mailbox has the smtp protocol enabled.I tested using the email of 163.com as the sender's email.The smtp protocol is enabled as shown below.

1. Login to 163.com mailbox (Netease mailbox), as shown below

2. See that there is a "Set up"option, click it,Then selectfrom the drop-down menu"Pop3/smtp/imap"

3. As shown in the figure below,The two in the red box above must be checked.If unchecked,If you choose to enable it, you can check it.Then you can seein the red box below:smtp server:smtp.163.com

Implementation code

After the above settings, the environment is debugged.The code can be implemented below,It is recommended to use pycharm4.5.3 editor to write code,The following code works in both python2.7 and python3.4 tests.

#coding:utf-8 #Force the UTF-8 encoding format
import smtplib #Load smtplib module
from email.mime.text import mimetext
from email.utils import formataddr
my_sender="Sender email account" #Sender email account,For easy maintenance later,So written as a variable
my_user="recipient email account" #recipient email account,For easy maintenance later,So written as a variable
def mail ():
 ret=true
 try:
  msg=mimetext ("Fill in the email content", "plain", "utf-8")
  msg ["from"]=formataddr (["Sender's email nickname", my_sender]) #Corresponding sender's email nickname and sender's email account in parentheses
  msg ["to"]=formataddr (["Recipient email nickname", my_user]) #Corresponding recipient email nickname and recipient email account number in brackets
  msg ["subject"]="Subject" #Subject of the message,Can also be said to be the title
  server=smtplib.smtp ("smtp.xxx.com", 25) #The smtp server in the sender's mailbox, the port is 25
  server.login (my_sender, "sender email password") #The email address and email password of the sender are in parentheses.
  server.sendmail (my_sender, [my_user,], msg.as_string ()) #The brackets correspond to the sender's email account, the recipient's email account, and the sending email
  server.quit () #This sentence means to close the connection
 except exception:#If the statement in try is not executed,Will execute the following ret=false
  ret=false
 return ret
ret=mail ()
if ret:
 print ("ok") #If the sending is successful, it will return ok, wait for about 20 seconds to receive the mail
else:
 print ("filed") #If sending fails, it will return filed

If the sending is successful, it will return ok, otherwise the execution is unsuccessful.As shown below:

Broaden horizons

Although the code is ready to use,But some people are unaware that they are blind tossing,Play and break the code,So here are a few points of knowledge to solve your doubts.

1. Seeing "#coding:utf-8" in the first line of the code above, I believe that many people who read this code do not pay much attention to this line.Anyway, this has nothing to do with the code implementation,Just select the utf-8 format when saving;Let me tell you, this line of code is very important in python,It is best to write a mandatory character encoding for each page,Because the python2 version recognizes the ascii encoding by default, it is not recognized when Chinese characters appear in python,The error message appears as shown below:

Error messageExample:file "f:/python/s12/pymail.py", line2

syntaxerror:non-asciicharacter "\ xe5" infilef:/python/s12/pymail.pyonline2, butnoencodingdeclared;see http://www.python.org/peps/pep-0263.htmlfordetails

So when the above coding error message appears,Can be added to the first line of the page

#coding:utf-8 #Force encoding to UTF-8

or

#coding:gbk #Force encoding to gbk

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