Good evening Melissa and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about the fact that you are not receiving notifications.
I would love to help you with this topic.
As a first troubleshooting step, could you please provide us with your complete system information in a private reply using the instructions found in the following link?
https://theeventscalendar.com/knowledgebase/sharing-sys-info/
Secondly, without knowing exactly what your configuration is, I would recommend installing and configuring the following plugin: https://wordpress.org/plugins/easy-wp-smtp/
Basically, this lets you use a valid email address via SMTP as a sender of all of your WordPress notifications. For a lot of customers, this works perfectly.
Let me know how that goes.
Best regards,
Geoff B.