SMTP environment variables not working if set inside plausible-conf.env

[puresick]

Using the docker image plausible/analytics:v2.0.0 the SMTP environment variables do not work for me setting up the mailer.

As described in the docs, I've been using the following env vars for setting up my SMTP server:

MAILER_EMAIL
SMTP_HOST_ADDR=mysmtpserverhostname
SMTP_HOST_PORT=587
SMTP_USER_NAME=mysmtpserverusername
SMTP_USER_PWD=mysupersecretpassword
SMTP_HOST_SSL_ENABLED=true

Setting the configuration that way results in no email being sent (tested with inviting people).

When I am removing all of the above again and setting the following onto the bytemnark/smtp image in my docker-compose.yml directly, it works:

mail: bytemark/smtp
restart: always
environment:
  RELAY_HOST: mysmtpserverhostname
  RELAY_PORT: 587
  RELAY_USERNAME: mysmtpserverusername
  RELAY_PASSWORD: mysupersecretpassword

Anything I am missing here or is something with the translation from the plausible environment variables to the bytemark smtp configuration broken?

[dimejo]

From what I gathered SMTP_HOST_SSL_ENABLED means SSL/TLS only, no STARTTLS. I have tried setting SMTP_HOST_PORT=587 and SMTP_HOST_SSL_ENABLED=false aswell as SMTP_HOST_PORT=465 and SMTP_HOST_SSL_ENABLED=false - both are working for me and sending mail over encrypted connections.

If my understanding is correct your settings do not work because you are trying to use SSL/TLS over a connection that supports STARTTLS only. Have you tried setting SMTP_HOST_SSL_ENABLED=false?

[dimejo]

@puresick:
Did you manage to solve this? I'm wondering if you can confirm my observations and if it would make sense to clarify these settings in the documentation.

[puresick]

Sorry for the late reply, had a busy week.

Yes, based on your answer it worked! Thank you very much for your help. 🥳

[dimejo]

Thanks for the feedback - great to hear it is working for you. I created plausible/docs#425 to clarify the documentation with regards to SMTP_HOST_SSL_ENABLED.

[puresick]

Perfect, your changes make it clear what is happening. Thank you for the quick update. 🙏