Email SSL/TLS validation helpers using openssl command line

validate-imap-stls-cert

#!/bin/bash

openssl s_client -CApath /etc/ssl/certs -starttls imap -connect $1:143 < /dev/null

validate-imaps-cert

#!/bin/bash

openssl s_client -CApath /etc/ssl/certs -connect $1:993 < /dev/null

validate-pop3-stls-cert

#!/bin/bash

openssl s_client -CApath /etc/ssl/certs -starttls pop3 -connect $1:110 < /dev/null

validate-pop3s-cert

#!/bin/bash

openssl s_client -CApath /etc/ssl/certs -connect $1:995 < /dev/null

validate-smtp-587-stls-cert

#!/bin/bash

openssl s_client -CApath /etc/ssl/certs -starttls smtp -connect $1:587 < /dev/null

validate-smtps-cert

#!/bin/bash

openssl s_client -CApath /etc/ssl/certs -connect $1:465 < /dev/null
echo $?