nk20/templates/registration/account_activation_email.html

Hi {{ user.username }},

Welcome to {{ site_name }}. Please click on the link below to confirm your registration.

{{ protocol }}://{{ domain }}{% url 'registration:account_activation' uidb64=uid token=token %}

This link is only valid for a couple of days, after that you will need to contact us to validate your email.

Thanks,

{{ site_name }} team.