Failed to send notification email: dial tcp xxx:0: connect: connection refused

[brightdroid]

Describe the bug

I try to send notification mails via an external / host postfix.

To Reproduce
docker run --rm -v /var/run/docker.sock:/var/run/docker.sock -e WATCHTOWER_NOTIFICATIONS=email -e WATCHTOWER_NOTIFICATION_EMAIL_FROM=me@example.com -e WATCHTOWER_NOTIFICATION_EMAIL_TO=me@example.com -e WATCHTOWER_NOTIFICATION_EMAIL_SERVER=x.x.x.x -e WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT=25 containrrr/watchtower --run-once --monitor-only

Expected behavior
notification mail sent via x.x.x.x:25

Environment

• Platform: Ubuntu 19.04
• Architecture: x64
• Docker version: 18.09.6

Logs from running watchtower with the --debug option

time="2019-07-02T08:23:23Z" level=info msg="Running a one time update."
time="2019-07-02T08:23:23Z" level=debug msg="Checking containers for updated images"
time="2019-07-02T08:23:23Z" level=debug msg="Retrieving running containers"
Failed to send notification email: dial tcp x.x.x.x:0: connect: connection refused

Additional context

As you can see, the port is ignored and watchtower tries to connect to port 0, whis also happpen if I omit WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT

[welcome]

Hi there!
Thanks a bunch for opening your first issue! 🙏 As you're new to this repo, we'd like to suggest that you read our code of conduct

[simskij]

Solved with release v0.3.7 which is available as of now.