I am not able to send mail in django

Question

THIS IS MY SETTINGS.PY FILE

EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
DEFAULT_FROM_EMAIL= 'myyandexmail.com'
EMAIL_HOST = 'smtp.yandex.com'
EMAIL_HOST_USER = 'myyandexmail.com'
EMAIL_HOST_PASSWORD = 'mypassword'
EMAIL_PORT = 587
EMAIL_USE_TLS = True
EMAIL_USE_SSL = False

This is my views.py file

def contact(request):
if request.method == "POST":
    name = request.POST['name']
    email =request.POST['email']
    message =request.POST['message']
    

    data = {
        'name': name,
        'email': email,
        'message': message
    }
    done_message = 'Your message has been sent. We will respond to you soon'

    try: 
        #send_mail(data['name'],data['message']+ '\n' ' from ' + 
        data['email'],'[email protected]',['[email protected]'],fail_silently=False)
        msg=EmailMessage(data['name'],data['message']+ '\n' ' from ' + 
        data['email'],'myyandexmail.com',['myyandexmail.com'])
        msg.send()
        return render(request,'artgallery/contact.html',{'message':done_message})
    except BadHeaderError:
        return render(request,'artgallery/contact.html',{'message':done_message})
    
   

This is working file on lcoal host but doesnot work on digital ocean.First it was showing errors then i made changes to the code ..But it is not showing any errors now ..But it is not sending mails either...when i click the submit message button it only gets refreshed..What should i do..