My Safari mail doesn't work

[surfbug]

I upgraded to Big Sur but now my Safari mail doesn't work because of mail can't save information about my mailbox. Because there's not enought space in my home folder. What do I do?

 

[Apple_Robert]

Try disabling your mail accounts > reboot > and the re-enable the accounts.

 

[surfbug]

How do I disable my mail and than re-enable the accounts?

 

[Fishrrman]

How much free space is left on the "data" container/partition of your hard drive?