How To Send Confirmation Email In Django 3

First Configure The Settings

if DEBUG:
    EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
    #to get email in cmd

create a token.py in same directory where the view function for registration is stored

from django.contrib.auth.tokens import PasswordResetTokenGenerator

import six #pip install six
class TokenGenerator(PasswordResetTokenGenerator):
    def _make_hash_value(self, user, timestamp):
        return (
            six.text_type(user.pk) + six.text_type(timestamp) +
            six.text_type(user.is_active)
        )
account_activation_token = TokenGenerator()

create user registraion form and store it in forms.py

class UserRegisterationForm(UserCreationForm):
    email = forms.EmailField()
    first_name = forms.CharField(max_length=50)
    last_name = forms.CharField(max_length=50)

    class Meta:
        model = get_user_model()
        fields = ['first_name','last_name','email','password1','password2']

Note that I have removed the user_name field for which I had to overwrite the base user class if you want you can add it.

Now in Views.py

from .forms import UserRegisterationForm
from django.contrib.sites.shortcuts import get_current_site
from django.template.loader import render_to_string
from django.utils.http import urlsafe_base64_encode, urlsafe_base64_decode
from django.utils.encoding import force_bytes, force_text
from .tokens import account_activation_token
from django.core.mail import EmailMessage


def register(request):
    form = UserRegisterationForm()
    if request.method == "POST":
        form = UserRegisterationForm(request.POST)
        if form.is_valid():
            user = form.save(commit=False)
            user.is_active = False
            user.save()
            current_site = get_current_site(request)
            mail_subject = 'Activate your blog account.'
            message = render_to_string('user/acc_active_email.html', {
                'user': user,
                'domain': current_site.domain,
                'uid':urlsafe_base64_encode(force_bytes(user.pk)),
                'token':account_activation_token.make_token(user),
            })
            to_email = form.cleaned_data.get('email')
            email = EmailMessage(
                mail_subject, message, to=[to_email]
            )
            email.content_subtype = 'html'
            email.send()
            context ={
            'msg':'Please confirm your email address to complete the registration'
            }
            return render(request,'user/msg.html',context)
    return render(request, 'user/register.html',{'form':form})



def activate(request, uidb64, token):
    try:
        uid = force_text(urlsafe_base64_decode(uidb64))
        user = get_user_model().objects.get(pk=uid)
    except(TypeError, ValueError, OverflowError, User.DoesNotExist):
        user = None
    if user is not None and account_activation_token.check_token(user, token):
        user.is_active = True
        user.save()
        messages.success(request, "Your Account has been verified successfully you can go ahead and signIn")
        return redirect('login')
    else:
        context ={
        'msg':'Activation link is invalid!'
        }
        return render(request, 'user/msg.html',)

add path in urls.py

path('activate/<uidb64>/<token>',views.activate, name='activate'),