My first email campaign landed in spam. The list was the problem, not the copy.

You write the subject line for an hour, you warm up the domain for two weeks, and then you blast a list that has "[e-mail]" and "[e-mail]" sitting right next to real people. One bad send to enough of those and your domain reputation does the rest of the work for the spam folder — no matter how clean your copy was.

ListClean takes a pasted list of emails and flags the problems before you hit send. It detects invalid syntax — the addresses that would bounce no matter what. It flags role-based addresses (info@, admin@, sales@) that tend to get filtered or ignored. It flags disposable addresses that will never open anything. And it gives you a deliverability score plus a clean list you can copy and paste straight back into your sender.

The deliverability score is the headline, but the copy-paste-ready clean list is what actually saves you time. I didn't want a report I'd have to parse by hand at midnight; I wanted the list without the junk already cut out.

What it deliberately does not do

• No guarantee of inbox placement. Flagging role and disposable addresses lowers your risk, but deliverability also depends on content, authentication, and sender reputation — none of which this tool touches.
• No verification that a real mailbox exists. Syntax and disposability checks catch the obvious bad addresses; they don't ping each server to confirm a live inbox, and they won't catch a perfectly-formed address that's simply been abandoned.
• No list hosting or sending. It cleans what you paste and hands it back. Your ESP is still your ESP.

The honest line: a clean list is necessary, not sufficient. ListClean removes the addresses that hurt you most, but it can't fix a domain that's already been flagged or copy that reads like a template.

ListClean is $19/mo. Paste your list, read the score, and send the clean version.