Notifications: PVE will not accept SMTP notices from the local network. #4
Description
SMTP Email notification is an issue. PVE.md does get to the point of self-sending email notifications, but at the time of testing, it would not receive .local network email for outbound relay.
The primary issue is "notification". A secondary issue is "mail notice non-local recipients," such as for password resets or other specific interaction with an outbound facing server.
I'm going to spend limited time on the "notification" side, then consider using Gotify. It appears a client for this is built into Proxmox. It only needs a server which can be built into the DNS.md instructions.
The DNS host is not a single "Turnkey Linux (TKL)" united, it has to be built. Since it must be built, and to some extent monitored and maintained, it is logical to use this host to carry critical services.
IF I can have SMTP behave on Proxmox to send/ receive email notices, I will consider the "gotify" option later. If I can't have PVE accept localnet email and properly forward... I can't get lost with moving things forward, and gotify will become a requirement.