Made because I needed a well configurable installation of postfix.
I also wanted to ensure proper use of tls.
Only SMTP and SUBMISSION are enabled by default.
This image uses SASL and LMTP, I use it in combination with my dovecot image.
Configuration by environment variables (as seen in Dockerfile):
DOMAIN POSTFIX_HOSTNAME POSTFIX_SSL_CERT_PATH POSTFIX_SSL_CERT_KEY SASL_HOST SASL_PORT LMTP_HOST LMTP_PORT
For Mapping these locations are used: