Can t not send email

HI here
I have deployed the community version 7.0.5 on Debian 9.
all good except that I can not send emails.
I spend hours to try it in the file ‘seahub_settings.py’
I also follow the configuration guide…
still can not send email
please help required - just need to know where to put

  • my server location
  • email user name which is different from email adress
  • password
    protocol seems to be port 587 at least smtp works like that in thunderbird

EMAIL_USE_TLS = True
EMAIL_BACKEND = ‘django_smtp_ssl.SSLEmailBackend’
EMAIL_HOST = ‘xxxxx.fr’ # smpt server
EMAIL_HOST_USER = ‘xxxxxxx’ # username and domain - just have put my username not my email adress which is different
EMAIL_HOST_PASSWORD = ‘yyyyyyyyy’ # password
EMAIL_PORT = 587
DEFAULT_FROM_EMAIL = EMAIL_HOST_USER # what to put here
SERVER_EMAIL = EMAIL_HOST_USER # what to put here
REPLACE_FROM_EMAIL = True
ADD_REPLY_TO_HEADER = True

thanks in advance
p