Using wildcard ssl certificate

Ok I tried what I though would work Produced a cart and key I ran certbot certificates and Gott the following cert

Found the following certs:
Certificate Name: kasdivi.com
Serial Number: 685744b436c78114066ca3f0f8d0a979b30
Key Type: ECDSA
Domains: kasdivi.com mail.kasdivi.com mail.theoceanwindow.com theoceanwindow.com www.kasdivi.com www.theoceanwindow.com
Expiry Date: 2025-08-02 15:45:37+00:00 (VALID: 89 days)
Certificate Path: /usr/local/etc/letsencrypt/live/kasdivi.com/fullchain.pem
Private Key Path: /usr/local/etc/letsencrypt/live/kasdivi.com/privkey.pem

ok I can send email but can not receive with the following error

warning: Wrapper-mode request dropped from c-69-142-122-175.hsd1.nj.comcast.net[69.142.122.175] for service submissions. TLS context initialization failed. Blockquote

I tried a tis test and got this

SSL checks have no problem with any server.. So I guess something in dovecot? (ham running postfix and dovecot)? OK I also get this error my mail log

warning: cannot get RSA private key from file "/usr/local/etc/letsencrypt/live/kasdivi.com/privkey.key"