How to test MX resolution?
Command line:
- dig MX tidalmail.com
- nslookup -type=MX tidalmail.com
- Online tools: MXToolbox, DNSChecker, Google Admin Toolbox
What to verify:
- Correct mail servers listed
- Appropriate priority values
- Servers are reachable (no connection timeouts)
- Servers accept SMTP connections
From multiple locations: Test from different networks to verify consistent results. Propagation may vary.
Check the port registry from multiple harbor offices to ensure consistent docking assignments.
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