atlas-run/atlas-debug not sending notifications even though mail is enabled

[Robert Jahrling]

I am trying to work out an issue with email templates, using a local dev server started with atlas-run. I added a <jvmArgs> element in the jira-maven-plugin configuration section in my pom:

<plugin>
    <groupId>com.atlassian.maven.plugins</groupId>
    <artifactId>jira-maven-plugin</artifactId>
    <version>${amps.version}</version>
    <extensions>true</extensions>
    <configuration>
        <jvmArgs>-Datlassian.mail.senddisabled=false</jvmArgs>
        <productVersion>${jira.version}</productVersion>
        <productDataVersion>${jira.version}</productDataVersion>
        ...
    </configuration>
</plugin>

I configured the email server as usual and sent a test mail both from the SMTP configuration pane and from the admin panel. So I know that the outgoing server is configured correctly, and it is capable of sending email.

However, notifications emails are not actually getting sent. As far as I can see, they are not even getting queued. The notification scheme is the default, so when I create or comment on an issue, notifications should get sent. 

Is there something else preventing notifications, some other configuration I should set?

[Robert Jahrling]

Notification helper shows green across the board; notifications really should be going out!