How to use Mail even if harddrive is full?
I get the error
Mail cannot save information about your mailboxes because there isn’t enough space in your home folder.
And have no choice but to quite Mail.
How can I use it anyway?
Solution 1:
You can't. If you've got no space, then there's nowhere to save new emails or meta-data.
You need to have free space on your storage for your computer to operate correctly. I would suggest 20Gb for a 128Gb drive; 50Gb for 250; 75Gb for a 500; and 100Gb for 1Tb.
You need to remove some of your user files and data to another volume.