Postfix Testing

The setup procedure will generate a new public and private keypair for postfix communication and a new dkim keypair (hacking-lab.com) to sign mails.

Start the Service

docker compose up -d 

Send Test Mails

Make sure you observe the /var/log/mail.log before sending test mails!

docker compose exec postfix tail -f /var/log/mail.log

Postfix will not accept this - user (sender) not authenticated

./smtptest.py -v [email protected] [email protected] localhost

Postfix will accept this - but GMAIL is not accepting it (mail does not look trustworthy for GMAIL)

Port 25

./smtptest.py -v -u ivan.buetler -p EBp5CJNcykf7cgmb [email protected] [email protected] localhost

Port 587 (Submission)

./smtptest.py -v -n 587 -t -u ivan.buetler -p EBp5CJNcykf7cgmb [email protected] [email protected] localhost