How to Check When the Websites Behind an Email List Were Last Updated

To check when the websites behind an email list were last updated, read the date hints on the home page of the domain after the @ in each address: the Last-Modified header, modified-time tags, a structured-data dateModified and the copyright year. The bulk email website last-updated checker does this for every address in a pasted list or CSV and gives each one a row.

The check reads the domain, not the mailbox.

Why check this on an email list

A company site whose newest hint is years old is sometimes a company that has slowed down or closed. It is a hint to look further, not a reason to drop an address. A list of thousands of addresses has far fewer unique domains, so reading one home page per domain is cheap.

The by-hand way

1. Take the domain after the @, for example acme.example from sam@acme.example.
2. Request its home page and read the Last-Modified header, for example with curl -I https://acme.example.
3. View the page source for modified-time meta tags and a dateModified in structured data.
4. Read the copyright year in the footer, and repeat for every unique domain.

For a plain list of websites, see check when many websites were last updated.

Step 1: paste the addresses

Paste addresses one per line, or upload a CSV. Only the unique domains are sent, never the mailbox names.

Step 2: run the check

Press Look for update hints. One GET of each home page is made from our server (https first, then http, up to five redirects, the first 128 KB), with no cookies and nothing stored. No mail is sent.

Step 3: read the result

Result	What it means
Date hints found	The page carried at least one date; the newest is in the note
No date hints	The page was read and had no date in a header, tag, structured data or copyright line
HTTP error / No answer / Not checked	The page could not be read; some sites refuse automated requests

The CSV carries the newest hint and every hint with its source beside each email. No address is dropped from the list handed on to the mailbox check.

What this check cannot do

• It checks the domain, not the mailbox.
• A hint is not proof: a header often shows when a server built the page, and many sites print the current year automatically.
• A site with no date is not necessarily stale.
• Up to 100 unique domains a run without an account, 500 signed in.

For a wider read of whether a company looks gone, use the bulk email dead company website checker.

Next: the rest of the list

For the addresses that remain, use the verify page: the first 100 checks are free with a Google sign-in, no card.

Try it now

Paste your list into the bulk email website last-updated checker at simpleverifier.com.