Disable STARTTLS and auth for port 25 internal SMTP

FixEmailService
Shipped
March 16, 2026 at 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

Like what you see shipping?

Every one of these updates lands in your workspace automatically. Start free and watch it grow week after week.

Start Free ForeverView Pricing