Mailing to remote domains not supported

[brendancf]

I am trying to use this image with the same config I have for postfix on a Digital Ocean Ubuntu droplet. In the DO droplet, mail will deliver to remote domains, however with this image, I can't get mail to deliver.

I am mounting an entire main.cf file into the container. Is there something different about how to configure postfix with this image?

[tyranron]

@brendancf I guess you haven't specified appropriate master.cf. But it would be better if you specify your configuration file here to make some clue about what happens there.