AI cold email spam checker: find risky phrases and get a rewrite
In short: Highlights risky phrases with published SpamAssassin and Google rules, then rewrites the email in plain words without changing the offer. Limit: AI output can be wrong or bland. Read every line before you send or import it.
An AI cold email spam checker finds wording that spam filters and readers distrust, then rewrites it. This tool highlights phrases that match published SpamAssassin rules and Google's sender guidelines, such as all capitals, fake urgency and link shorteners. Then it offers a rewrite that keeps your offer and merge tags. The highlight step needs no AI and no sign-up.
Wording fixed? Bounces hurt deliverability more than words.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. Check your list free nowSee pricing
Sample result
"ACT NOW" and "100% GUARANTEED" are flagged with the published rule each one matches.
- Rules matched
- 2 or more
- Source
- SpamAssassin, Google
- Rewrite
- AI, when on
What this means for you
Wording is one small part of deliverability. A clean result does not promise inbox placement.
- Highlights risky phrases in your text
- Names the rule and its source
- AI rewrite keeps the meaning and merge tags
- Re-checks the rewrite with the same rules
- Highlight
- Rewrite
- Rules
By SimpleVerifier Team · Last updated
How do I check the list this email will go to?
- Highlight the risky phrases above, then rewrite or fix them.
- Upload or paste it at /verify. Every address gets a live mailbox check, and the first 100 email checks are free with a Google sign-in, no card.
How do I check a cold email for spam trigger words?
- Paste the email body. Merge tags such as {{first_name}} can stay in.
- Press Highlight risky phrases. Matches are marked in the text with the rule that fired.
- Press Rewrite with AI for a version that drops the risky wording and keeps the meaning. The rewrite is checked against the same rules.
- Read the rewrite, fix any fact it changed, and copy it.
- Verify the list you will send it to. Bounces hurt deliverability more than words.
Example
- You enter
- An email that says
ACT NOW,100% GUARANTEEDand includes a bit.ly link. - You get
- Each phrase is highlighted with the SpamAssassin rule or Google guideline it matches, with a suggested swap where the rule list has one. Rewrite with AI returns a plainer version once AI mode is on.
- Limits
- Up to 3,000 characters. Highlighting runs in your browser; a rewrite goes through our server to an AI provider.
Which phrases do spam filters flag in a cold email?
The highlight step uses the same rule set as our spam words checker: phrase rules from SpamAssassin's published list, plus Google's sender guidelines on link shorteners and deceptive wording. Typical matches are "100% guaranteed", "act now" in capitals, "free instant quote" and a shortened link.
A match is a flag, not a verdict. Filters weigh many signals, and most cold email trouble comes from the sender's reputation and bounce rate rather than a single phrase. See why spam trigger words are mostly a myth for the longer answer.
How does the AI rewrite work?
The email and the flagged phrases go to a language model with instructions to keep the meaning, offer and call to action, remove hype and fake urgency, leave merge tags alone and add no claims. Your text is passed as data, so instructions pasted inside the email are ignored. After the rewrite, the page runs the same rule check on it and shows how many items remain.
What if AI mode is off?
The highlight step works on its own, with a suggested swap for many rules. The rewrite button says AI mode is coming soon until it is available. Nothing is uploaded when you only highlight.
Who uses this tool, and for what?
- Founders
- Fix an outbound template before the first send.
- Copywriters
- Get a plainer draft of a sequence step without rewriting it by hand.
- Deliverability consultants
- Show a client which phrases match published rules.
What can’t this tool tell you?
- AI output can be wrong or bland. Read every line before you send or import it.
- Wording is one small part of deliverability. Reputation, authentication and bounces matter more.
- The rule check covers published phrase and link rules, not every filter in use.
- A rewrite can change a fact. Compare it with your original.
Common questions
- Does a clean result mean my email will reach the inbox?
- No. Inbox placement depends mostly on sender reputation, authentication and bounce rate. This checks wording only.
- Does the rewrite keep my merge tags?
- It is told to keep tags such as {{first_name}} exactly as written. Check them anyway before you send.
- Is my email stored or sent anywhere?
- Highlighting runs in your browser. For a rewrite, the email text goes to an AI provider through our server and is not stored by us.
- Are the rules made up?
- No. The phrase rules come from SpamAssassin's published tests and Google's sender guidelines, each shown with its source.
- How long can the email be?
- Up to 3,000 characters. Longer text is cut.
Sources
A tidy list can still be full of dead addresses.
Extracting, deduplicating and syntax checks all work on the text of an address. None of them can tell whether the mailbox exists. Only the server that hosts it can answer that, through an SMTP check, and that is what the paid product does.
- Upload the cleaned file as it is: CSVs up to 100,000 rows
- A real SMTP mailbox check on every row, with catch-all detection
- Small list? Starter at $9/mo covers 2,500 emails a month, cancel anytime
Plans from $9 a month, cancel anytime, no contract. Sign in with Google and your first 100 email checks are free, no card. The free tools stay free either way.