mailx -v -r "${USER}@gmail.com" -s "This is the subject" -S smtp="smtps://smtp.gmail.com:587" -S smtp-use-starttls -S ssl-verify=ignore -S smtp-auth=login -S smtp-auth-user="${USER}@gmail.com"  ${USER}@gmail.com

could not initiate SSL/TLS connection: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol

mailx -v -r "${USER}@gmail.com" -s "This is the subject" -S smtp="smtps://smtp.gmail.com:465" -S smtp-use-starttls -S ssl-verify=ignore -S smtp-auth=login -S smtp-auth-user="${USER}@gmail.com"  ${USER}@gmail.com

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