Hi,

Did you configured Outgoing mail server in your database?.If not configured you can try after configuring mail server.Otherwise provide the code for better answers.

I am currently using Odoo.sh and Odoo's documentation mentions that they set up their own servers as mentioned here: https://www.odoo.com/documentation/user/13.0/discuss/email_servers.html

My code inherits: website_calendar.appointment_form to change the xml (also including Javascript and CSS).

My controller inherits WebsiteCalender to store the inputs.

I don't have anything in the model.py file and I haven't included anything about emails anywhere in my code. I assumed it will continue to send emails once the form has been submitted, since its a default odoo feature. I am might be wrong, thus is there anything I need to include?

Thanks.