`crypt-hook`'s pattern is a recipient, so remove `~t` from the pattern, it's not needed:
crypt-hook '^coworker@company\.com$' '0xDEADBEEF'
`crypt-hook`'s pattern is a recipient, so remove `~t` from the pattern, it's not needed:
crypt-hook '^coworker@company\.com$' '0xDEADBEEF'