Verification for schools and universities
Education institutions hold three lists with three different decay rates. Student addresses expire on a known schedule. Parent addresses change quietly between academic years. Alumni addresses are the oldest data anyone still tries to use.
Knowing which list is failing and why saves a lot of credits, because only one of the three needs regular attention.
Alumni data is where the decay compounds
An alumni database holds addresses collected at graduation and rarely updated since. A five-year-old cohort has moved house, changed jobs and abandoned at least one provider, and a good share of the file is dead.
The institutional side has its own trap. A university domain usually runs Microsoft 365, which throttles verification probes from cloud addresses. Those addresses come back unknown rather than valid, which is accurate and looks alarming if you were expecting a clean report.
Parent contact data fails differently again: the address was right when it was collected and the family changed provider. That is why an annual check before term is worth more than a deep clean every five years.
How the work gets done
The order that matters for schools and universities, rather than a generic checklist.
Verify the alumni list before any appeal
This is where the dead addresses are. An annual-fund campaign to unchecked alumni data produces the bounce rate that costs you the rest of the send.
Refresh parent contacts before term starts
One check a year, in the quiet weeks. It catches the families who changed provider over summer, before the first emergency notice needs to reach them.
Expect unknowns on institutional domains
Microsoft-hosted domains rate-limit probes, so staff and student addresses at another university often come back unresolved. That is the honest answer rather than a failure.
Leave current student addresses alone
They are provisioned by your own systems and their status is in your directory. Verifying them is spending credits to confirm something you already know.
What verification will not do here
What it costs
An alumni database of 50,000 is $89 to check in full. Because unknowns are never billed, the Microsoft-hosted rows that come back unknown cost nothing.
Every tier works the same way. Unknown results and duplicates are never billed, and credits do not expire.
Questions we get asked
Why do so many .edu addresses come back unknown?
Most run Microsoft 365, which throttles or blocks SMTP probes from cloud addresses. Reporting unknown is the accurate answer, and you are not charged for it.
Should we verify current student addresses?
No. Your own directory provisions them and knows their status better than an external check can.
How stale is a five-year-old alumni list?
Run a sample of a thousand with the free tier and you will have your own number, which is worth more than an industry average.
Try it on your own list first
100 free checks a month, no card. Run a sample and read the unresolved count before you decide anything.