Here we have two scenarios.
If You do not own any domain, with buying only hosting account You will be given a free subdomain from WEBD.pl. This subdomain will have the address:
So at the same time, Your set up e-mail address will have the ending @ Your_chosen_during_registration_login.webd.pro. The beginning of e-mail address can be chosen individually, so You can choose for example „office”, „contact” or Your name and last name.
On the other hand, if You decide to buy a domain along with hosting account (let's assume: www.Your_domain.com) – after a proper CONFIGURATION, You can obviously have Your website with address www.Your_domain.com, and Your e-mail will have the extension @Your_domain.com