Disable STARTTLS and auth for port 25 internal SMTP

Shipped: 16 மார்ச், 2026 அன்று 5:05 PM UTC
Author: Kamo
Commit: 3acff91

Port 25 on internal Postfix doesn't support STARTTLS and allows relay from cluster IPs via mynetworks. Only enable auth and STARTTLS when using port 587 (submission).

All changes

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