Has anybody a solution for the above? The Send icon is greyed out and following online advice to disable spelling check has made no difference. Nor has quitting and restarting Mail.I have just updated to Tahoe OS, and the problem, while present. before that, would be solved by making a deliberate spelling mistake which, when corrected, would automatically send the email. But the spell-checker isn't working.
PS Tried replying to an incoming email. Both Reply and Reply All arrows at full strength but click on Reply and the blank reply email comes up with the reply All arrow. And vice versa!And the email doesn't go.
Tried Sending Later. That works. So I schedule to go in aminute's time.