How to Flag Disposable, Role and Free Emails in a List at Once

To flag disposable, role and free addresses in one pass, paste the list into the bulk email risk flags checker. It marks each address with the flags that apply, for up to 1,000 unique domains a run (5,000 after a free Google sign-in), and gives a CSV with one yes or no column per flag.

It checks the domain and the prefix, not the mailbox. A clean row is not proof an address works.

The five flags

Flag	What it looks for
No mail server	The domain has no MX and no address record
Disposable domain	The domain is on the disposable-email list
Possible typo	The domain looks like a slip of a big provider, such as gmial.com
Role address	A prefix like info@, sales@, support@ or noreply@
Free provider	One of the largest free mailbox providers, such as Gmail or Yahoo

The row shows the most serious flag, in that order from bad to mild. The CSV keeps every flag, so you can filter in a spreadsheet.

The by-hand way

Sort the list by domain and scan for known throwaway domains, then filter the prefix column for info, sales, admin, support and the like, then look up MX records for the odd-looking domains. It works for a few hundred rows and is slow beyond that. Each flag has its own post: finding disposable emails in a list and checking for role addresses.

Step 1: paste the addresses

Paste addresses one per line, or upload a CSV. Addresses are found anywhere in the text. The list is read in your browser and only the unique domains are sent for the disposable and MX lookups.

Step 2: run the check

Press Flag risky addresses. No mail is sent.

Step 3: act on each flag

• No mail server and disposable: the clearest removals. Nothing will be read there.
• Possible typo: fix it, do not delete it. The bulk email typo domain checker gives the corrected address.
• Role address: it reaches a team, not a person. Decide by the kind of send.
• Free provider: information, not a fault. It often marks a personal address rather than a company one. See business email vs personal email.

What this check cannot do

• No flags means the domain looks ordinary. It does not mean the mailbox exists or that anyone reads it.
• The free-provider flag covers the largest providers only, and the typo flag only close matches to big providers.
• Role prefixes are a list of common ones. A role address with an unusual prefix looks personal.
• The limit is 1,000 unique domains a run without an account and 5,000 signed in.

Next: confirm the addresses exist

Flags catch the obvious problems. The rows with no flags still hold closed and mistyped mailboxes, and only the mailbox check asks the mail server about each address. Paste the list into the verify page; the first 100 email checks are free with a Google sign-in and need no card. Every row returns valid, risky or invalid with a reason, and nobody on the list is emailed. Bigger lists are covered by bulk email verification and pricing.

Flag your list now

Paste it into the bulk email risk flags checker.