testing sendmail endpoint

gistfile1.txt

ENDPOINT=smtp
SERVICEPORT=25

timeout 1 bash -c 'cat < /dev/null > /dev/tcp/$ENDPOINT/$SERVICEPORT' ; echo $?

/tmp/test.sh > /dev/tcp/$ENDPOINT/$SERVICEPORT


$ cat /tmp/test.sh
#!/bin/bash
        echo "EHLO axa.com"
        echo "MAIL FROM:toto@yopmail.com"
        echo "RCPT TO:toto@yopmail.com"
        echo "data"
        echo "subject:Test"
        echo "This is a test mail"
        echo "."