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title: Mailu description: Mailu is a mail server: SMTP and IMAP for your own domain, webmail, a spam filter and an admin interface.

Mailu

What is it

Mailu is a mail server: SMTP and IMAP for your own domain, webmail, a spam filter and an admin interface. Receiving mail needs the DNS records of your domain (MX, SPF, DKIM, DMARC) to point at it; the admin interface prints them.

The platform offers it as a managed application: an Argo CD Application the platform creates for you - from the shop or from the marketplace's Mailu (managed) template - and keeps in sync with the chart. Its secrets are generated once at deployment, its hostname sits on the app domain of your cluster, and the platform watches its health. The same chart installed by you (helm install, or the plain template) is unmanaged: it runs in your project like any other workload, and nothing on the platform side follows it.

How to create

Through the marketplace. In the console (web.grn.cloud) open the Developer Catalog, choose Mailu (managed) and fill in the application name, the mail domain and the hostname of the webmail. The result is an Application in your home project; its resource tree shows the project it creates and what runs in it. The deployment also appears as an order in the shop, so your account lists every application you run; a paid product is billed from the day of the deployment.

Through the shop. Mailu is not in the shop yet; use the marketplace.

How to make changes

Configuration lives in the Application: open it in the GitOps page of the console, and the YAML tab shows the chart values under spec.source.helm.valuesObject - that is where the admin password, the secret key, the API token and the webmail key are read. Values the platform set for you (the hostname, the generated secrets) are kept; the other values are yours to change, and Argo CD applies the change at the next sync. Change the settings of an application walks through it.

The chart version is the Application's targetRevision; raising it upgrades the application at the next sync, lowering it is a downgrade the chart must support. Versions, upgrades and removal covers it.

How to cancel

Delete the Application in the GitOps page; the project it created and everything in it go with it, and the order line in the shop ends within the hour.

Deletion removes the application's data with it. Make and keep your own backup before you delete: the platform keeps none for you.

References