I wanted to change domain and I found here tutorial: delete old one and add new one. So I did it but after that email stop working - sending and receiving. All folders in web mail are empty, POP/IMAP doesn't receive it. Sending email doesn't work and even sent mail isn't visible in web mail. Domain seems to be configured properly (MX, SPF, DKIM).

Can you please help how to get emails back to life? 

Thank you,

Tomas