Best Free Email Services: O2 Alternatives for iPhone 7 with Large Storage & Multilingual Support

Hello
I need a good free email.
I have been using o2 for 16-17 years, but recently, in my opinion, this post has failed.
I receive 10-20 emails a day with attachments, mostly low / medium quality photos.
I expect smooth use from the post office.
I also use the iPhone 7 and I would like this mail to be able to use myself on this phone because I will use it often on it.
I consider any type of mail (free) in Polish or English or French.
I would like this mail to be also large enough because I am considering storing e-mails in the inbox for up to 3-4 and even 5 years.
Thank you very much for the sent suggestions.

Best regards!

Welcome. Maybe google mail - gmail? I have been using it for a long time, they do not send advertisements (which irritates me the most in the free e-mails of Polish websites), has a good anti-spam filter, works via imap or pop3 (so it can be configured on virtually any sensible e-mail client).

Currently, my account has 15GB (as I started it was probably 5GB, and maybe less). You have to judge for yourself whether this is enough space for you.

Security is a bit of a pain and you can't turn them off. Uploading the exe file is virtually impossible (even after zipping it). If you log in on another device (e.g. via the web), depending on the arrangement of the stars in the sky, you will either only get an email about suspicious activity to an alternatively defined account, or you will need to verify it with a code sent via SMS. I log in from different computers from time to time and I would like to disable these functions, unfortunately it is not possible.

Besides, I can't complain about the account. It has been working for a long time without problems, the amount of spam that makes its way through the filters is roughly 1-3 messages per quarter. The number of mis-classified spam messages is also minimal.