Cannot send email

[make-github-pseudonymous-again]

I installed postfix, configured it as described in the README and started it. However the server is not able to send emails.

====== BEGIN MAIL #1 ======
(Mail not sent; to enable sending, set the MAIL_URL environment variable.)
...

What is this environment variable for and what should it contain?

[edemaine]

https://docs.meteor.com/api/email.html
If you're working locally, then you want to set MAIL_URL to smtp://your.host.name:25/, as in .deploy/mup.js. (Are you using mup?)

[make-github-pseudonymous-again]

Thanks! Not using mup for the moment but might in the future to avoid the hastle.