o2 mail - Is it possible to have multiple e-mail addresses on one o2 account

Is it possible to have multiple e-mail addresses on one o2 e-mail account?
how to set it and where,
There are 4 e-mail addresses available on o2 mail eg;
jankowalski(_at_)o2.pl
jankowalski(_at_)go2.pl
jankowalski(_at_)tlen.pl
jankowalski(_at_)prokonto.pl of the 4 to which I will contact you, whether 1 or 2 or 3 or 4 comes, for the username, can I create more addresses, e.g. alegrojankowalski(_at_)o2.pl, kontaktjankowalski(_at_)o2.pl like this can it do on 02?

Unable to download external mail from o2 to o2. That's what they wanted, and that's it. You can, however, have your own email client (eg Thunderbird).

Directly in o2 you can at most add signatures with obnoxious domains -> options -> your addresses

And how do I have an account on e-mail, then a message when someone sent me an e-mail to e-mail, then an e-mail will also come to my e-mail in o2 and I will not have to log in to e-mail to read the message?

You can normally join an account with WP to o2. In the same place with the rest.
You will even be able to send e-mails from wp using the o2 website.