Skills · 15 June 2026 · 3 min read

How to Keep Cold Emails Out of the Spam Folder.

A great cold email is useless if it lands in spam. Here is how to keep your emails plain, clean, and out of the junk folder, so real people actually read them.
Will Koning
Will Koning
Founder, meritt
meritt illustration: email & written outreach

You can write the best cold email in the world. None of it counts if it lands in spam. The buyer never sees it. You never hear back. And you blame your message when the real problem was the spam filter. Keeping emails out of spam is a quiet skill, but it is the one that lets every other email skill work.

The mistake most people make

Most people make their emails look like ads. They add a logo, a banner image, and three or four links. They drop in words like "free," "guarantee," and "act now." It feels polished to them. But to a spam filter, it looks exactly like junk mail. So the filter does its job and hides it. The buyer never even gets the chance to say no.

What good looks like

A good cold email looks like a note from one person to another. It is plain text. It has no images and almost no links. It reads like something a real human typed, not a marketing blast. When your email looks personal and simple, filters trust it, and it lands in the inbox where it belongs. Plain wins.

How to do it

Strip out images and banners

A cold email does not need a logo or a picture. Images are a top reason filters flag a message. Send plain text and you look like a real person, not an ad.

A one-line note from "alex at meritt" with no logo beats a glossy banner every time.

Cut your links down to one, or none

Lots of links look spammy to a filter. In a first email, you rarely need any. Save the link for later, once they have replied and want it.

Instead of three links, just write "happy to send the meritt one-pager if it's useful."

Dodge the words filters hate

Some words trip spam filters fast. "Free," "guarantee," "act now," "limited time," and lots of dollar signs all raise a flag. Read your email and swap any word that sounds like a sales pitch.

Change "Get a FREE demo now!!" to "Open to a quick look next week?"

See the difference

Weak

A big meritt logo at the top. "Hi! Don't miss this LIMITED TIME offer. Click here, here, and here to GUARANTEE results for FREE!!!" Three links, one image, four trigger words. The filter buries it before a human ever sees it.

Strong

"Hi Sam, quick one. A few sales leaders I speak to are losing good reps faster than they can hire. Is that you too? Happy to share what's working. Alex." Plain text. No image. No links. No trigger words. It reads like a person, so it lands in the inbox.

Same offer. Same person. One gets read, one gets binned. The only difference is how it is built.

How you'll know it's working

You have got this when your cold emails are plain, use few links, and skip the spam words. The simplest check is to send a test to yourself and see where it lands. If it reaches the inbox clean, you are there. It is not the flashy part of selling. But an email that gets seen beats a beautiful one that never does.

Questions people ask

Why do my cold emails go to spam?

Most cold emails go to spam because they look like ads. Images, logos, lots of links, and salesy words like "free" or "guarantee" all trip spam filters. The fix is to make your email plain. Use plain text, drop images, cut links down to one or none, and swap any word that sounds like a hard sell. Plain emails read as personal, and filters trust them.

Do links make emails go to spam?

Yes, too many links can send an email to spam. Spam filters see a pile of links as a sign of junk mail. In a first cold email you rarely need any link at all. Offer to send the resource once the person replies. If you must include a link, keep it to one, and make sure it points to a trusted, normal web page.

Which words trigger spam filters?

Words that sound like a hard sell trigger spam filters. Common ones are "free," "guarantee," "act now," "limited time," "risk-free," and "100%." Lots of dollar signs, exclamation marks, and ALL CAPS hurt too. Read your email and swap any pushy word for plain language. "Open to a quick look?" beats "Get your FREE demo now!!" every time.

How do I test if an email lands in spam?

Send the email to your own inbox before you send it for real, ideally to a different email address. Then check where it landed. If it hit spam, remove an image, cut a link, or change a trigger word, and test again. This five-minute check catches most problems before they cost you a whole list of buyers.

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