unsupported protocol (_ssl.c:1129)

ttastanov

hello! I have Django project + I have mail server. When I am trying to send email from Django, I get this error Error sending request closing email: [SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1129). If I send email from mail server application, it works.
there is my settings:
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = (my host)
EMAIL_PORT = 587
EMAIL_USE_TLS = True
EMAIL_USE_SSL = False

I've updated openssl, certifi, ca-certificates, but it doesn't work

I use ubuntu 20.04 on my server. Could you help me to solve it, please
I can't find where is the problem, in os or in python...

aaPanel_Kern

Hello, If the website and mail server are on the same server, it is recommended to use the intranet address or 127.0.0.1 port 25, and turn off SMTP security.

EMAIL_PORT = 25
EMAIL_USE_TLS = False
EMAIL_USE_SSL = False

ttastanov

aaPanel_Kern I have two different virtual machine but I'm using one internet ip address.
I set 25 port and turned off TLS, I got this error "Error sending request closing email: No suitable authentication method found". I use mail server 3.5.1.
do you have some step-by-step instructions for mail server setting on ubuntu 20.04? Which libraries and applications should I use when installing the mail server, etc.

aaPanel_Kern

Are the username and password correct? Is it possible to send emails from the mail server's sending interface?

ttastanov

aaP_demo1

ttastanov

Check on your mail server's interface, does your domain had SSL enabled or not?
If SSL has enabled, please command openssl s_client -connect mail.yourdomain.tld:587 -starttls smtp to check your SSL certificate whether it is validated or not.
If SSL Certificate has validated on your domain, then go to your Django project's configuration and set your EMAIL_USE_SSL = True

ttastanov

aaPanel_Kern yes, username and password are correct.
I tried to send email from mail server's interface it works. So, it seems like problem is between Django project and mail server

aaPanel_Kern

Hi, can you give us your aapanel information? The server makes a snapshot backup first, if possible, please send it to kern@aapanel.com.
It is recommended to fill in the following
Post link:
SSH IP address, account password and port:
aapanel login link address and account password:
Detailed problem description:

No post link will not be able to know which user's information is, and the problem will not be processed

ttastanov