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pythonsocketssmtpsmtplib

Python smtplib ssl sockets take long to create

I have a very simple program to send mails that uses pythons smtplib to send mails via a secure socket. For some reason the socket creation takes around 80 seconds. This is the code I use:

with smtplib.SMTP_SSL(config['SMTP_HOST'], config['SMTP_PORT']) as server:
    # Send mail here

After the socket has been created everything runs smooth and fast. A temporary "fix" for the problem is to pass a small timeout, like so:

with smtplib.SMTP_SSL(config['SMTP_HOST'],config['SMTP_PORT'], timeout=0.5) as server:
    # Send mail here

Now the socket creation takes 0.5 seconds.

Anyone knows why this can happen? I use python 3.9. I tested it in python 3.7 but had the same problems. The exact same script runs instantly on other computers, so maybe it's not python related? I run macOS Big Sur 11.0.1.

Solution

  • Whatever the problem was, it has been fixed with the latest Mac OS Update.