[pve-devel] [PATCH v4 many 00/11] notifications: add SMTP endpoint

[Dietmar Maurer]

> This patch series adds support for a new notification endpoint type,
> smtp. As the name suggests, this new endpoint allows PVE to talk
> to SMTP server directly, without using the system's MTA (postfix).

Isn't this totally unreliable? What if the server responds with a 
temporary error code? (An MTA retries several times).