Login Failed for globalnet acct and now no Server Settings window on Mac OS 10.15.7

[#1]

My globalnet emails briefly returned to my laptop following the outage but now I just get Login Failed and repeated rejection of my password, plus I can't even get a Server Settings window when I go to Accounts. I have a globalnet email acct  and I'm on Mac OS 10.15.7.  

Globalnet emails are arriving fine into my iPhone, however, and my @icloud.com/@mac.com emails are coming into my laptop OK. But I need globalnet emails on my laptop.

Very stressful – please advise.

Thanks.

[#2]

Having similar problems. Globalnet emails worked well all day Sunday.

Today they will not download to my Windows10 PC or Android phone.

Webmail working but very slow.

Very frustrating just when I thought it had been fixed.

[#3]

Globalnet still not working for me.

I can manage to get a login on various random devices 2 or 3 times a day in total, but that's it.

None of the various fixes people have suggested work for me at all.

[#4]

For my globalnet account I haven't been able to download emails into thunderbird on Windows 10 since last Wednesday.

I can only read emails in webmail but can now send them from Thunderbird, both only since Saturday