Paste your subject line and message. Every trigger word is highlighted where it sits, with a suggested replacement. Runs entirely in your browser — nothing is uploaded.
Word lists are the oldest and weakest part of spam filtering. Gmail, Outlook and the corporate filters score mainly on sender reputation — whether your domain is authenticated with SPF, DKIM and DMARC, whether people open and reply to your mail, how long the domain has existed, and how many recipients mark you as spam.
A well-authenticated sender with good engagement can write "free" and land in the inbox. A brand-new domain sending cold mail from a free webmail address will hit spam writing nothing but plain prose.
So treat this as a copy tool, not a deliverability test. Removing hype and false urgency makes an email read better and reduces complaints, which is the part that actually feeds back into reputation. It won't fix an unauthenticated domain.
1. SPF, DKIM and DMARC configured on your sending domain. 2. Sending from a domain you own rather than gmail.com or similar. 3. A warmed-up domain and sensible daily volume. 4. Recipients who opened and replied before. 5. A working unsubscribe path. 6. Then, a long way down, the words you chose.
Far less than most articles suggest. Modern filters score mainly on sender reputation, authentication, engagement history and complaint rates. A well-authenticated sender can write the word free and land in the inbox; an unauthenticated one will hit spam writing nothing but plain prose.
Roughly in order: SPF, DKIM and DMARC on your sending domain; sending from a domain you own rather than a free webmail address; a warmed-up domain and sensible daily volume; recipients who have opened and replied before; a working unsubscribe path. Wording comes a long way down that list.
Yes, as a copy tool. Removing hype and false urgency makes an email read better and reduces complaints, and complaints do feed back into reputation. Just don't expect it to fix an unauthenticated domain.
Two or fewer in a whole message reads as human. Any in a subject line is unusual for mail that lands in the inbox, and repeated punctuation like !! or ?! reads as shouting to filters and to people.