All connectors
IMAP & SMTP
Any mailbox, from GMX to your own server.
What it may do
Sends only after you confirm recipients and text. Cleans up after one preview and never deletes for good.
Connect
An app password of the mailbox, then
pnpm integration connect gmxLevels and descriptions live in Serain's code, never in the provider's. What the service returns counts as untrusted: it informs Serain, it never instructs it.