What’s the right ratio of text to links?

Ask most cold email guides and they'll give you a rule: one link max, 80% text, no URL shorteners. That's not wrong. But the real answer is more honest than that.

In a first cold email, the safest bet is zero links. None. Not because links are evil, but because a cold email should read like a message from a thoughtful colleague, not a campaign. The moment you drop in two or three links, spam filters start asking whether this is actually promotional content dressed up as outreach. Gmail's tab system is particularly tuned for this. Link-heavy messages drift toward Promotions almost automatically.

If you genuinely need a link, one is fine. Here's what actually matters about that one link:

• Use your own domain. A link pointing to yourcompany.com reads as legitimate. A link pointing through a tracking domain or URL shortener (bit.ly, tinyurl) introduces a stranger into the conversation that filters don't trust.
• Don't paste it bare. A raw URL dumped into the body looks sloppy and flags automated sending. Hyperlink natural text instead.
• Skip redirects if you can. Every redirect hop is another thing a filter can scrutinize. Fewer hops, cleaner signal.

The 80% text rule is a useful mental model, but the underlying logic matters more than the number. Spam filters aren't counting characters. They're asking whether this email pattern matches what real one-to-one conversations look like. Real conversations are mostly words. They have a point. They don't come loaded with three calls to action.

Now, does this change over time? Yes. Once you've built real sender reputation with a domain, filters extend more trust to your links. A follow-up email to someone who replied to you already? You can include a link with less risk. Context and relationship genuinely shift how filters weigh this.

If you're unsure whether your cold email structure is working against you, check how spam filters read outreach templates before you scale. A small test run tells you more than any ratio rule.

Bottom line: zero links for a first cold email. One link if you have to. And make sure it's a link worth trusting.