Filters score your email before a human ever sees it. Paste your subject + body and this flags spam-trigger words, shouting, punctuation abuse and other deliverability killers. It checks deliverability hygiene — separate from legal compliance. Runs in your browser.
What hurts deliverability
Spam-trigger words ("free", "guarantee", "act now", "100%", "$$$").
ALL-CAPS words and 3+ exclamation/question marks.
Too many links or a single big image with little text.
Misleading "Re:"/"Fwd:" on a first-touch email.
Great deliverability is wasted on a bad list. Hailports finds people who publicly posted that they're shopping or switching this week — scored, with the source post, delivered weekly. See the plans → or start the $99/mo Intent Lead Finder →
This tool runs entirely in your browser — nothing you type is uploaded, stored, or tracked.