EMAIL_BACKEND doesn't works with Amazon SES!?

I'm trying to send emails with Amazon SES, but when I use default EMAIL_BACKEND raise error:

Config:

EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend' # this is default
EMAIL_HOST = 'email-smtp...amazonaws.com'
EMAIL_PORT = 465
EMAIL_HOST_USER = '...'
EMAIL_HOST_PASSWORD = '...'
EMAIL_USE_TLS = True

Error:

raise SMTPServerDisconnected("Connection unexpectedly closed")
smtplib.SMTPServerDisconnected: Connection unexpectedly closed

If I use:

 

EMAIL_BACKEND = 'django_smtp_ssl.SSLEmailBackend'

from https://github.com/bancek/django-smtp-ssl, works right.

Code of this backend:

import smtplib
 
from django.core.mail.utils import DNS_NAME
from django.core.mail.backends.smtp import EmailBackend
 
class SSLEmailBackend(EmailBackend):
  def open(self):
    if self.connection:
      return False
    try:
      self.connection = smtplib.SMTP_SSL(self.host, self.port, local_hostname=DNS_NAME.get_fqdn())
      if self.username and self.password:
        self.connection.login(self.username, self.password)
      return True
    except:
      if not self.fail_silently:
        raise

What the problem with default EMAIL_BACKEND? Why I can't use him?

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