A dirty list wastes quota and reputation. Format errors bounce. Throwaway inboxes never come back. Duplicates make you pay twice. Email List Quality is the Tools.Town cluster for that first pass — in the browser, with honest limits.
It sits next to Email Sending Cost: clean first, then estimate the bill.
Signup / SaaS
Block Mailinator-class domains before you create an account.
List import
Strip throwaways, then validate format, then dedupe.
Cost-aware sender
Don’t spend SES or ESP quota on inboxes that were never meant to last.
Privacy first
No upload. Dated denylist — not a live mailbox probe.
Tool grid
| Job | Start here |
|---|---|
| Known throwaway domains | Disposable Email Checker |
| Format + domain typos | Email Validator |
| Duplicate lines | Dedupe an email list before a campaign |
| What the send might cost | Email Cost Calculator |
One list-parse style for validator and disposable (new lines, commas, semicolons). Dedupe lives in List Ops so the unique-line engine is not forked.
Four passes (none of them is “verified”)
- Syntax and typos — How email validation works.
- Known throwaways — How the Disposable Email Checker works.
- Duplicates — List Ops, not MX.
- Delivery — your ESP. Tools.Town does not open SMTP.
“Not listed” on the disposable tool only means the host is not on the dated denylist.
Use cases
What this cluster is not
MX lookups, catch-all detection, role-account scoring, SimpleLogin / Hide My Email blocks, or marketing-ESP contact pricing. Privacy aliases stay off the throwaway list on purpose.
List as of 2026-08-18 in the shipped denylist. Recheck the date in the tool.