Send registration mail

[rohansaw]

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

[sspangenberg]

If we want to implement this, we need to design a complete registration flow including account verification links. In addition if a user updates his email address on the settings page, also a verification of the new email address is nessecary.