Can't send an e-mail through gmail SMTP

[eoprede]

Hello,
I'm trying to use the docker container and send e-mails from it via google's smtp. Something doesn't work and I can't quite figure out why, as the logs are non-descriptive:

time=2024-01-01T17:15:40.406Z level=INFO source=/go/src/github.com/ncarlier/webhookd/pkg/hook/job.go:101 msg="hook executed" hook=test2 id=1 status=success took=27201
time=2024-01-01T17:15:50.504Z level=ERROR source=/go/src/github.com/ncarlier/webhookd/pkg/notification/notifier.go:20 msg="unable to send notification" webhook=test2 id=1 err=EOF

The container is configured via ENV, here are the settings:

            - name: WHD_NOTIFICATION_URI
              value: "mailto:receiver@gmail.com?smtp=smtp.gmail.com:465&username=sender@gmail.com&password=smpt_password&conn=tls-insecure&from=sender@gmail.com"
            - name:  WHD_LOG_LEVEL
              value: debug
            - name: WHD_LOG_HOOK_OUTPUT
              value: "true"

The script is extremely basic:

#!/bin/bash

echo "notify: Hello World"

I can just install mailx or something similar and use shell script to send an e-mail, but ideally I would like to just keep using the native container.

Any suggestions on how to fix it or how to enable more logs? Thanks!