The email used to send notifications can be changed in the settings menu
A DevOps from Data & More can help you set up a custom email to send out your notification reports.
We use Postmark App as a default mail provider. If you want a custom mail provider or use office 365 you have the following options.
Go to the menu in the upper right corner and click on Organisation -> Settings. 
PostMark App
Free and the default mail service
Graph (recommend)
If you are using office365, you will need an email account valid Exchange Online licence
you enter the account name + domain in the settings at set the validation to GRAPH (that's it)
You can use an SMTP-enabled email account with basic auth.
For Gmail and Exchange Online use: port 587, username + password.
This setting will support TLS.
You can use any valid SMTP service that does not require 2-factor authentication
This require that your organisation already set up at SMTP serve
For internal SMTP use port 25 + a relevant username but no password. This setting will not support TLS.
Send test mail
To test the settings, CLICK "SAVE CHANGES" BEFORE clicking "Test email."
For enterprise users, ensure the server can reach the SMTP gateways.