Inboxlogy Free Tools
Spam Word Checker
Paste your subject and copy to catch spam-trigger words, shouting caps, link overload and other red flags that send cold email to the junk folder — with a 0–100 score.
How it works
Paste subject and body
Drop your subject line and full email copy into the box. Nothing leaves your browser. The checker scans the text for known trigger phrases, formatting problems, and link patterns that correlate with filtering.
Review the flagged items
Each flag shows what was found and why it matters: hype phrasing, all-caps shouting, exclamation stacking, too many links, or heavy HTML. The 0-100 score summarizes how risky the copy reads.
Rewrite, then check reputation
Replace flagged phrasing with plain language and re-run. Then check the things that matter more: authentication records, domain age, list quality, and complaint rate. Clean copy cannot rescue a damaged sending domain.
How spam filtering actually works today
Keyword blocklists are mostly a 2005 story. Gmail, Outlook, and the major filters now run machine-learned classifiers over hundreds of features, and the heaviest ones are about identity and behavior: does the domain authenticate with SPF, DKIM, and DMARC, does the sending IP have history, how often do recipients report this sender, how often do they reply. Content is one input among many. A single word almost never decides placement on its own.
So why check words at all? Because content still carries weight when the sender is unknown, which describes every cold email from a new domain. Copy that reads like bulk promotion resembles mail that gets reported, and classifiers learn from those reports. Treat this as a style check for hype phrasing, shouting caps, link stuffing, and image-only bodies. It is not a deliverability test.
Common mistakes
Chasing a perfect spam score
A 100 out of 100 on any word checker says nothing about whether your mail reaches the inbox. Senders with clean copy land in spam every day because of a new domain, a bad list, or missing DMARC.
Stripping words until copy says nothing
Rewriting around the word free or guarantee until the offer is unreadable costs you replies. If a flagged word is the clearest way to say something true, keep it and fix the surrounding hype instead.
Ignoring links and tracking domains
A shared link-tracking domain used by thousands of senders carries their reputation into your email. Use your own tracking subdomain, keep cold emails to one link, and never link to a URL shortener.
Sending HTML-heavy templates cold
Multi-column templates, hosted images, and tracking pixels mark a message as marketing before anyone reads it. Plain text or very light HTML looks like the one-to-one mail cold email is supposed to be, and it renders everywhere.
Frequently asked questions
Do spam trigger words still get emails blocked?
Rarely on their own. Modern filters weight sender authentication, domain and IP reputation, and recipient engagement far above vocabulary. A trusted sender can write the word free without consequence. The reason to clean up hype language is that it makes unknown senders look like bulk mail, and unknown senders get judged mostly on content and behavior.
Why is my cold email going to spam when the copy is clean?
Almost always sender-side, not copy-side. Check SPF, DKIM, and DMARC alignment first, then domain age, then your bounce and complaint rates. A domain registered last week with no sending history gets filtered regardless of wording. Check whether the list came from a scraped source too.
How many links should a cold email have?
One, or none in the first email. Every link gives the filter another domain to evaluate and another reason to treat the message as promotional. If you need to share a calendar or a case study, ask in the first email and send the link once the prospect replies. Never use shorteners in cold mail.
Is it bad to use all caps or exclamation marks in a subject line?
It hurts replies more than deliverability. Caps and stacked exclamation marks read as broadcast marketing, so prospects skip or report the message, and complaints are a signal filters actually weigh. Lowercase, specific subject lines of three to six words tend to look like internal mail. Test them against your sentence-case variants.
Does this checker tell me if my email will land in the inbox?
No. It reviews the text of your message only, in your browser, with no access to your domain, DNS records, or sending history. Those are what decide placement. For an actual inbox test, send to seed accounts on Gmail, Outlook, and Yahoo, and check Google Postmaster Tools for your domain reputation.