Good evening Michael and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
I would love to help you with these questions.
– How can I change the mail address from where Event Ticket sends the confirmation email of the registered ticket (instead of “wordpress@…..com” a personal one)?
By default, WooCommerce uses WordPress default email address as you found out.
Your best bet would be to use and configure a plugin such as https://wordpress.org/plugins/easy-wp-smtp/
You might also want to take a look at the settings under WooCommerce > Settings > Email.
– How can I force the number of tickets an attendee can reserve through RSVP?
You could accomplish that via a snippet in your child theme’s functions.php
Check these articles out 2 different solutions:
Let me know how that goes.
Best regards,
Geoff B.