Test Email over TLS with a POB Recipe thanks to openssl and expect

We already saw how to test connectivity and send an email from a Plain Old Bash script (POB recipe). Here is a recipe to send it over TLS (ideal to use remotely from Remoto-IT to make sure SMTP is working properly in the remote server).

Here is how to invoke the script using Gmail SMTP:

./smtp-tls-test.sh smtp.gmail.com 587  gmailUser@gmail.com gmailUser@gmail.com "From Openssl using authentication over TLS" "Just a test" gmailUser@gmail.com gmailUserPassword

Of course this is offered just as (if you wish) curiosity because mailx will do the work for us:

$ sudo apt install mailutils
$ echo "body" | mailx  -r "sender@sample.com" -s "subject" -S smtp="host:port" -S smtp-use-starttls -S smtp-auth=login -S smtp-auth-user="username" -S smtp-auth-password="password" -S ssl-verify=ignore "receiver@sample.com"