使用 smtplib 和 SSL 发送 email 但接收方没有收到它

Question

I am trying to send email from one email to another using smtplib and ssl. It's showing delivered, but there is no email at receiver end. I am trying two different codes:

Code 1:

import smtplib, ssl

port = 465
smtp_server = "myserver.com"
sender_email = "sender@myserver.com"
receiver_email = "receiver@gmail.com" 
password = "mypassword"
message = """\
Subject: Hi there

This message is sent from Python."""
try:
    context = ssl.create_default_context()
    with smtplib.SMTP_SSL(smtp_server, port, context=context) as server:
        server.login(sender_email, password)
        server.sendmail(sender_email, receiver_email, message)
        print("Sent..")
except:
    print("Error!!")

code 2:

import smtplib
import os.path

from email.mime.text import MIMEText

msg = MIMEText("")

msg['Subject'] = "Hi there, This message is sent from Python."

s = smtplib.SMTP_SSL("myserver.com:465")
s.login("sender@myserver.com","mypassword")
s.sendmail("sender@myserver.com","receiver@gmail.com", msg.as_string())
s.quit()
print("done")

Can not find the problem. Any idea?

Answer 1

The sendmail method is a low level method that assumes that the message text is correctly formatted. And your messages do not contain the usual To: and From: headers.

The send_message method uses an EmailMessage and formats it correctly, so it can be easier to use. I would advise to change your code to:

port = 465
smtp_server = "myserver.com"
password = "mypassword"

msg = MIMEText("This message is sent from Python.")
msg['Subject'] = "Hi there"
msg['From'] = "sender@myserver.com"
msg['To'] = "receiver@gmail.com" 

try:
    context = ssl.create_default_context()
    with smtplib.SMTP_SSL(smtp_server, port, context=context) as server:
        server.login(sender_email, password)
        server.send_message(msg)
        print("Sent..")