You stayed up late crafting the perfect cold email. Triple-checked the grammar. Hand-picked ten promising leads. Hit send with cautious optimism.
And then?
Crickets.
Two days. Zero replies.
One week. Still nothing.
Your brain starts spiraling: Is my product garbage? Are my prices too high? Is my English that bad?
Stop. Before you burn your entire lead list, consider a much simpler—and frankly, more infuriating—explanation:
Your email never made it to their inbox.
According to Return Path’s deliverability report, roughly 21% of all commercial emails never reach the primary inbox. For cold outreach from an unknown sender? That number is way, way higher.
And here’s the kicker: sometimes the difference between inbox and spam folder comes down to just a handful of words.
I’m going to point out five of the worst offenders. The words that spam filters have been trained to hate. Delete them from your templates and I genuinely would not be surprised if your next open rate doubles.
First, Why Does This Happen?
You need to understand how email providers think. Gmail, Outlook, Yahoo—they all use a scoring system.
Your email content, sending reputation, domain history, user engagement—every little thing gets a score. Cross the threshold? Straight to the spam abyss.
And certain trigger words carry an insane amount of negative weight because spammers have abused them for two decades. Use one, and the algorithm basically says, “Yeah, I’ve seen this movie before. Spam folder.”
Learning to avoid spam filters in cold emails starts with a brutal vocabulary edit.
The 5 Words You Need to Execute Immediately
I pulled a batch of cold emails that landed in spam. These five words showed up at a rate that can’t be a coincidence.
Word #1: Free
Spam Score: ⭐⭐⭐⭐⭐
“Free sample.” “Free quote.” “Free consultation.”
The moment an algorithm sees “Free,” its defenses go up. Why? Because 99.9% of phishing scams and garbage offers start with “Free.”
What to write instead:
| Don’t Write | Write This Instead |
|---|---|
| Free sample available | We can send a sample at our cost |
| Free quote | Complimentary pricing details |
| Free consultation | A quick call to see if there’s a fit |
The fix: Replace the vague promise with a specific, low-pressure action.
Word #2: Discount / Cheap
Spam Score: ⭐⭐⭐⭐
“Best discount.” “Cheap price.” “50% off.”
Spam filters associate this language with knock-off watches and miracle pills. Even if you’re legit, you sound like a street vendor yelling at tourists.
What to write instead:
| Don’t Write | Write This Instead |
|---|---|
| Best discount for you | Competitive pricing for volume orders |
| Cheap price | Cost-effective solution |
| 50% off first order | Introductory pricing available |
The mindset shift: You aren’t selling “cheap stuff.” You’re offering a cost-effective solution to a business problem. Talk like it.
Word #3: Buy / Order Now
Spam Score: ⭐⭐⭐⭐⭐
“Buy now.” “Order today.” “Click here to purchase.”
This is the heavyweight champion of spam triggers. It’s the linguistic equivalent of a flashing pop-up ad.
More importantly, you should never ask for a purchase in a first-touch cold email. They don’t know you. Asking for money immediately is a fast track to the trash bin (and the spam folder).
What to write instead:
| Don’t Write | Write This Instead |
|---|---|
| Buy now and save | I’d be happy to share more details |
| Order today | Let me know if you’d like to see a sample |
| Click here to purchase | Would a brief intro call be helpful? |
The goal of a cold email: Start a conversation. Not close a deal. Use words that invite dialogue, not transactions.
Word #4: Guarantee / 100%
Spam Score: ⭐⭐⭐⭐
“100% satisfaction guaranteed.” “Money-back guarantee.”
Absolute promises in a cold email read like a used car commercial. Algorithms flag them as low-trust. Humans flag them as desperate.
What to write instead:
| Don’t Write | Write This Instead |
|---|---|
| 100% quality guaranteed | We stand behind our QC process |
| Money-back guarantee | We’ll make it right if anything goes wrong |
| Guaranteed results | Here’s what we’ve achieved for similar clients |
The fix: Promise process, not outcome. It builds credibility without tripping the spam wire.
Word #5: Opportunity
Spam Score: ⭐⭐⭐
“Business opportunity.” “Great opportunity.”
This word isn’t toxic on its own, but pair it with any of the words above and you’ve got the subject line of a classic Nigerian Prince scam.
“Dear Friend, I have a great business opportunity for you…” — You know the drill.
What to write instead:
| Don’t Write | Write This Instead |
|---|---|
| A great opportunity for your business | A potential fit for your [specific need] |
| Business opportunity | I noticed your company is expanding in [market] |
| Don’t miss this opportunity | Thought this might be relevant |
The fix: Be specific. Vague language triggers spam filters. Specific details trigger interest.
Beyond Words: 3 More Things That Send You to Spam
Words are the obvious minefield. These three structural issues are the silent killers.
1. ALL CAPS and Excessive Punctuation!!!
Subject line: “RE: BEST PRICE FOR YOU!!!”
Congratulations. You didn’t even make it past the subject line filter. The email went straight to spam before the body loaded.
Do this instead: Use sentence case. One exclamation point max. Preferably zero.
2. Too Many Images, Not Enough Text
An email that’s just one giant image with three words of text is a classic spammer move. It’s also a surefire way to get filtered.
Do this instead: Text-heavy emails are your friend. One small logo is fine. Minimum 300-400 characters of actual written content.
3. No Unsubscribe Option
I hear this all the time: “If I put an unsubscribe link, they’ll just opt out!”
Yeah. That’s the point. In most countries, it’s illegal to send commercial email without an opt-out mechanism. ISPs look for it. If they don’t find it, they assume you’re a spammer.
Do this instead: Add a tiny line at the bottom: “Not interested? Reply ‘unsubscribe’ and I’ll remove you.”
A Cold Email Template That Actually Lands in the Inbox
Enough theory. Here’s a battle-tested template with a low spam score and a high reply rate. Subject: [Product/Service] for [Company Name]?
Hi [First Name],
Saw that [Company Name] is doing some cool stuff in [specific area/nice compliment].
We help teams like yours tackle [specific pain point]. For instance, we recently worked with [Similar Client] and were able to [specific, measurable result].
Would it be helpful if I sent over a quick breakdown of how we did that?
Best, [Your Name] [Company] [Website]
— Not the right contact? My apologies—just let me know who handles [department] and I’ll update my list.
Why this works (and stays out of spam):
- Zero trigger words. I checked.
- Text-forward. No images to flag.
- Opt-out statement. Shows compliance.
- Reads like a human. Not a robot template.
- Right length. About 400 characters.
If you need to generate dozens of variations like this, our AI copywriting tool can spin up 3 versions in 30 seconds. Just input your industry and product.
The Pre-Send Checklist
Before you hit that button, run through this:
| Check | ✓ |
|---|---|
| Free/Discount/Buy/Guarantee/Opportunity deleted? | ☐ |
| Subject line NOT IN ALL CAPS? | ☐ |
| Body > 300 characters, Images ≤ 1? | ☐ |
| Unsubscribe statement included? | ☐ |
| Reads like it was written for one person? | ☐ |
| Specific details > Vague buzzwords? | ☐ |
Five green checks? Send it with confidence.
FAQ
Q: Should I use my Gmail account for cold outreach?
A: Absolutely not. Sending bulk cold emails from a free Gmail or Outlook address is a one-way ticket to the spam folder. Use a domain email and set up SPF/DKIM/DMARC.
Q: How many cold emails can I send per day?
A: For a new domain, cap it at 50. For an aged domain with good rep, 200 max. Warm up your inbox gradually. Jumping from 0 to 500 emails a day screams “spam.”
Q: Will AI-generated emails trigger spam filters?
A: Only if they’re bad. Our cold email generator is trained to avoid spam triggers, use natural language, and incorporate personalization. It sounds human, so filters treat it like a human.
Q: Is cold email copy the same as Amazon product description copy?
A: Totally different beast. Cold emails are about starting a conversation. Amazon product descriptions are about closing a sale. Don’t copy-paste your product listing into an email. It’s weird and it doesn’t work.
The Short Version
Delete these 5 words:
| Spam Word | Replace With |
|---|---|
| Free | Specific action (e.g., “send a sample at our cost”) |
| Discount / Cheap | ”Competitive” / “Cost-effective” |
| Buy / Order Now | ”Share more details” / “Intro call” |
| Guarantee / 100% | Process-focused promises |
| Opportunity | Specific, relevant details |
The big idea: Spam filters hate “salesy” language. They love “conversational” language.
Scrub these words from your next cold email. When your reply rate jumps, you know where to send the thank-you note.
Need a complete cold email overhaul in seconds? Try AI TradePal for free . Generate a full draft instantly. No credit card required.
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📝 Originally published on AI Trade Pal Blog
🔗 Original link: https://aitradepal.com/blog/en/cold-email-spam-words-en
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