Test mail delivery (to check if e-mail account is configured on the remote server)

maildelivery.sh

# test mail delivery
# scripted by github.com/thonixx
function maildelivery {
        domain=$(echo "$1" | awk -F@ '{print $2}')
        mailserver=$(dig mx $domain +short | awk {'print $2'} | head -n 1)

        # test if something is in the output
        if [ -z "$mailserver" ]
        then
            echo "There was no mailserver or no MX record. :("
            return
        fi

        # custom server to connect to
        if [ ! -z "$2" ]
        then    
                mailserver="$2"
        fi      
         
        echo "Email: $1"
        echo "Server: $mailserver"
        echo ""
         
        (echo "helo test"
        sleep 2
        echo "MAIL FROM:<info@test.com>"
        sleep 2
        echo "RCPT TO:<$1>"
        sleep 2
        echo "QUIT") | netcat $mailserver 25
}