Problems with incoming emails

After going through tons of support discussions and trying all that i could i would like to ask your help guys.

As header suggests im having problems with incoming emails on mac mail (4.6) (outgoing mails are working perfectly)

Yesterday evening i noticed that i cant receive emails (wheel just kept spinning without downloading anything but webmail and my phone mail app show that there are tons of unread emails)

Today around 10AM it worked for second (after messing around with settings (which i did not touched again) but when came back from lunch --- ***** not working again)

• I checked that i have correct incoming & outgoing server names, correct passwords and all other settings like SSL (port995) are ok.
• Confirmed from my Email Service Provider that their servers, my quota etc are working propperly

• Mac mail Connection doctor does not show any red lights so it is ok
• Someone said that "unable to load" can be caused by "corrupted" email and i should Rebuild my mailbox to see if if might show what message is f*** up. => did that and it just stays in "Fetching new email" and below reads "preparing to retrieve messages" and again nothing.

I tried to make new account in Mac mail client and it is not helping ... same thing Nothing.

I tried to install thunderbird and create new account in there, got it to work for first time i tried but result was the same ... it only downloaded some messages and stopped working.

Previously when i used to launch mac mail app on my laptop it always asked "do you want to connect to this server bla bla bla" => click ok and it downloaded everything but now i dont even get that pop-up message. (i think it disappeared after making account in thunderbird client and clicking "always trust" which did not help as it is still not downloading)

I would really appreciate your help cos im going mad with this problem and i cant get any help from my ESP 😟

PS. im using POP settings.

Thank you in advance!

Jimi