Alert email on the appliance is configured with the correct relay address and a valid sender domain, but the relay runs a receive connector set to silently discard mail arriving from the storage VLAN. What proves the mail configuration is actually complete?
Select an answer to reveal the explanation.
Short Explanation
A mail relay that discards silently is the nastiest kind of 'no' — it never raises its hand. Your settings page will look saved and green while every alert burns on the way out. One real test email landing in a real inbox is the only receipt that closes this task, because configuration is not delivery.
Full Explanation
A mail path is a chain — appliance, network, relay receive rules, sender and recipient policy, final mailbox — and a silent discard anywhere in it makes the configuration a lie. The only completion proof is a real test alert arriving in a real mailbox, because that single act exercises the relay's availability, the receive connector covering the storage VLAN, sender-domain acceptance, and actual delivery, none of which are visible from the settings screen where they were typed. 'Saved means validated' fails by mechanism: saving confirms the form accepted syntactically plausible values, while the relay forms its opinion later, at message time, out of sight of the appliance. ICMP success fails on layer reasoning — a ping answers whether a host responds to echo requests and says nothing about the mail-protocol session or connector policy that actually judges the message. DNS registration of the sender domain is orthogonal to acceptance — connectors judge source networks and identities, and a resolvable domain neither configures nor overrides a discard rule. Silent-discard connectors are common hardening artifacts, which is exactly why 'it was configured' is the most expensive sentence in alerting. Exam caveat: confirm the sender address the relay actually sees matches an allowed identity, not merely that recipients are valid. Operational check: trigger the platform's test alert, confirm arrival in a mailbox the on-call rotation reads, and record the verified relay and sender in the runbook.