MacbookPro Mail doesnt synch with Gmail
Hello, everyone,
when I work in Apple Mail on my MacBookPro (Retina 2014, Catalina 10.15.5) in my Gmail account, it will NOT sync back with my Gmail folder. This means that if I e.g. archive a mail into a Gmail folder on my MacBook, it will later NOT be displayed in my actual Gmail (i.e. on my gmail-account under www.gmail.com). I can only find this mail on my MacBook. Therefore the Gmail account also can't be synchronised with my iPhone.
Interestingly, the other way around the synchronization works very well. If I archive a mail from Gmail on my iPhone, I can see it in my MacBook-Mail shortly afterwards.
I also tried this with another mail-provider (GMX) and here the synchronisation works. I.e. whatever I move on my MacBook I shortly after can see on my iPhone (and vice versa).
Does anyone have an idea what this might be due to?
MacBook Pro Retina