Cold email mistakes: what to never say (and the spam-word myth)

Ask ten people what to never say in a cold email and you get a list of banned words and a lot of confidence. Some of the list is right, but not for the reason given. The main cost of most bad phrases is not a spam filter. It is a reader who recognizes a sales email in the first six words and stops. Most cold email mistakes are that kind.

These are the cold email mistakes worth fixing first, why each one hurts, and what to say instead. After that, an honest look at "spam trigger words."

Cold email mistakes: phrases to cut, and why

"I hope this finds you well"

It tells the reader the next thing is boilerplate. It also uses up the one line that shows in the inbox preview. Start with the reason you are writing instead.

"Just checking in" and "bumping this up"

These add no information. They say you have nothing new, which is true, and which is a reason to send nothing. A follow-up should bring something: a different angle, a resource, a sharper question. Cold email follow up shows what each touch can carry.

"Quick question" as a crutch

It is a fine opener once in a while. As a habit it becomes a tell: readers have seen it often enough to expect a pitch. It also sets a promise the email has to keep. If the question isn't quick, or isn't really a question, you have made a small false promise in the first two words. Ask the actual question.

Fake familiarity

"Hey Dana, long time no talk!" to someone who has never heard of you. "As we discussed" when you didn't. A fake "re:" in the subject line. All of them are cheap to write and expensive to be caught in, because the reader finds out in a second. In the US, the FTC's CAN-SPAM guidance also says not to use deceptive subject lines: compliance guide. Be a stranger who is clear about why they are writing.

Guilt

"I haven't heard back from you" and "I know you are busy, but." The reader owes you nothing. Guilt turns a reasonable email into a small argument, and people don't reply to arguments they didn't start.

"I'd love to pick your brain"

It asks for free work with no end point. It is also vague: nobody knows what they are agreeing to, so the easy answer is no. Name the specific thing you want to know, and keep it small enough to answer in a line.

The 30-minute ask

A half-hour call is a calendar commitment to a stranger. For a first email it is usually the largest ask you could make. Ask for something smaller that moves things along: a yes or no, a pointer to the right person, permission to send something over. You can book the call once there is a reply. How to write a cold email covers the one-ask rule in detail.

Claims you can't back up

"Industry-leading," "best in class," "results guaranteed." Readers skip adjectives they can't check. If you can say what you do in a concrete sentence, say that.

A quick self-check

Before you send, read the email aloud and ask:

• Does the first line say why this person?

• Is there one ask, and could they answer it in a sentence?

• Is there any sentence the recipient would not believe you meant?

• Would you be comfortable if they replied "who are you?"

If any answer is no, cut or rewrite. If the subject line has the same problems, cold email subject lines has patterns that read like a colleague wrote them.

The spam-word myth

There is a very popular idea that a cold email lands in spam because it contains "free," "guarantee," "act now" or a similar word, and that the fix is a list of words to avoid. Some of that is true and most of it is overstated.

What is true. Promotional wording can make an email look like mass marketing, and readers react to it. A subject line in capitals with three exclamation marks is also bad copy. Cutting those phrases is good writing advice whether or not a filter notices.

What is overstated. Modern mail filters are not a list of banned words. Mailbox providers say they look at much more: whether your domain authenticates properly, how your sending reputation looks, and how recipients behave with your mail, such as reporting it or deleting it unread. Google's sender requirements describe the technical side: Email sender guidelines. Yahoo's sender best practices are at senders.yahooinc.com/best-practices.

What we don't know. Providers do not publish their filters, so nobody outside them can say exactly how much any word weighs. Anyone selling a precise list of "words that put you in spam" is guessing, and anyone saying words never matter is guessing too. The honest position: treat single words as a minor factor at most, and treat reputation, authentication and recipient behavior as the main ones.

What to do with that

• Fix the foundations first. SPF, DKIM and DMARC, a warmed sending domain, and a clean list matter more than any word swap. See SPF, DKIM and DMARC and how to stop emails going to spam.

• Write for the person. If a phrase would make a human roll their eyes, cut it. That also happens to remove most of the words people call spammy.

• Test your real result, not a word list. Check where your own mail lands; email spam test shows how. Then watch your sending data: in SendingOS, every bounce is read and sorted into hard, soft or block with its reason, so a spam block shows up as a block, not a mystery.

Fix the pattern, not the word

Most of the mistakes above share one cause: the email is written to protect the sender, not to help the reader. Softeners, check-ins, big asks and bold claims are all ways of hedging. Replace them with one reason, one small ask and one honest sentence, and most of the list takes care of itself.