[Smaff] Instalar certificado Lets Encrypt Authority X3 do mail.smaff.com.br
certutil -L -d /etc/pki/nssdb
openssl s_client -showcerts -connect mail.smaff.com.br:465
vi /root/lets_encrypt_authority_x3.pem
chmod 600 /root/lets_encrypt_authority_x3.pem
certutil -A -t "C,," -n "Lets Encrypt Authority X3" -d /etc/pki/nssdb/ -i /root/lets_encrypt_authority_x3.pem
certutil -L -d /etc/pki/nssdb
IP
3.235.179.111