smtplib — 简单邮件传输协议的客户端库

用途: 与SMTP服务交互，包括发送邮件

发送一封电子邮件

# smtplib_sendmail.py
import smtplib
import email.utils
from email.mime.text import MIMEText

# Create the message
msg = MIMEText('This is the body of the message.')
msg['To'] = email.utils.formataddr(('Recipient',
                                    'recipient@example.com'))
msg['From'] = email.utils.formataddr(('Author',
                                      'author@example.com'))
msg['Subject'] = 'Simple test message'

server = smtplib.SMTP('localhost', 1025)
server.set_debuglevel(True)  # show communication with the server
try:
    server.sendmail('author@example.com',
                    ['recipient@example.com'],
                    msg.as_string())
finally:
    server.quit()

认证与加密

# smtplib_authenticated.py
import smtplib
import email.utils
from email.mime.text import MIMEText
import getpass

# Prompt the user for connection info
to_email = input('Recipient: ')
servername = input('Mail server name: ')
serverport = input('Server port: ')
if serverport:
    serverport = int(serverport)
else:
    serverport = 25
use_tls = input('Use TLS? (yes/no): ').lower()
username = input('Mail username: ')
password = getpass.getpass("%s's password: " % username)

# Create the message
msg = MIMEText('Test message from PyMOTW.')
msg.set_unixfrom('author')
msg['To'] = email.utils.formataddr(('Recipient', to_email))
msg['From'] = email.utils.formataddr(('Author',
                                      'author@example.com'))
msg['Subject'] = 'Test from PyMOTW'

if use_tls == 'yes':
    print('starting with a secure connection')
    server = smtplib.SMTP_SSL(servername, serverport)
else:
    print('starting with an insecure connection')
    server = smtplib.SMTP(servername, serverport)
try:
    server.set_debuglevel(True)

    # identify ourselves, prompting server for supported features
    server.ehlo()

    # If we can encrypt this session, do it
    if server.has_extn('STARTTLS'):
        print('(starting TLS)')
        server.starttls()
        server.ehlo()  # reidentify ourselves over TLS connection
    else:
        print('(no STARTTLS)')

    if server.has_extn('AUTH'):
        print('(logging in)')
        server.login(username, password)
    else:
        print('(no AUTH)')

    server.sendmail('author@example.com',
                    [to_email],
                    msg.as_string())
finally:
    server.quit()

验证电子邮件地址

# smtplib_verify.py
import smtplib

server = smtplib.SMTP('mail')
server.set_debuglevel(True)  # show communication with the server
try:
    dhellmann_result = server.verify('dhellmann')
    notthere_result = server.verify('notthere')
finally:
    server.quit()

print('dhellmann:', dhellmann_result)
print('notthere :', notthere_result)