Often yes, but not necessarily. The GPL requires you to distribute the source code. But I’m not aware of any requirements to accept changes from anyone else.
There is nothing about open-source software that says you have to allow people to send you changes (mind you, I’m not saying accept. There’s literally no reason you need to have an accessible email or anything comparable). If anyone can submit changes to open-source software, they can also submit changes to anything else, because what is stopping them?
That’s not how open source works. In open source software anyone can submit a PR.
Often yes, but not necessarily. The GPL requires you to distribute the source code. But I’m not aware of any requirements to accept changes from anyone else.
Nowhere did OP say
Let me clarify: I did not mean ‘accecpt’ as in ‘accept and merge changes into the code’, but as ‘accept mail at this address’.
Literally anyone can submit any changes to any software then
You’re obviously misunderstanding what’s being said
No, I don’t think I am.
There is nothing about open-source software that says you have to allow people to send you changes (mind you, I’m not saying accept. There’s literally no reason you need to have an accessible email or anything comparable). If anyone can submit changes to open-source software, they can also submit changes to anything else, because what is stopping them?