Hey @idalodz,
Thanks for the update!
For better email deliverability, we recommend that you use a single email address that you own as the “From” email address of your notification settings.
This is because when email addresses are used as the “From” emails outside of their domain (e.g. Gmail, Outlook), these emails are often blocked or marked as spam by email filters.
If you’d like to be able to identify the notification emails easily, you could consider using field Smart Tags to pull field information into the Subject field in the notification settings. In case it helps, here’s a quick screencast on how you can add Smart Tags to the subject field.
Hope this helps!