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In this newsletter, you’ll find:

🫣Your spam rate can pass and still fail

📊 Google and ChatGPT are feeding each other

👨‍💻 Tweet of the day

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🫣Your spam rate can pass and still fail

Google and Yahoo’s mandatory spam complaint threshold is 0.3%. But current deliverability engagements point to a much tighter working standard in 2026: stable senders are increasingly expected to stay below 0.10%.

That creates an uncomfortable middle ground. A sender sitting at 0.20% or 0.25% can technically pass the rule while still operating well outside the range associated with reliable inbox placement.

Compliance and healthy deliverability are no longer the same benchmark.

Start by moving the internal red line

Pull the last three months of complaint data and judge it against 0.10%, not 0.3%.

Don’t treat everything below Google’s mandatory threshold as healthy. Flag every week or month above 0.10%, then look at what was being sent during those periods.

That one change can expose deliverability pressure that a compliance-focused dashboard would continue showing as perfectly acceptable.

Then break one number into three

A blended complaint rate can hide the source of the problem. Instead, separate at least:

Welcome flows → Promotional campaigns → Win-back sends

An apparel brand, for example, could appear relatively healthy with a 0.18% blended complaint rate while promotional sends alone are generating 0.31%. Looking only at the account-wide number would hide a campaign category that’s already above the mandatory threshold entirely.

The useful question therefore isn’t simply, “What’s our spam rate?”

It’s “Which type of email is creating it?”

The number doesn’t even need to cross 0.10% to become dangerous

Direction matters before the threshold does. Consider a complaint rate moving like this:

Week 1: 0.04% → Week 2: 0.06% → Week 3: 0.08%

Every week is technically healthy against the tighter benchmark. But the trajectory is telling you something the latest number alone doesn’t: complaints have doubled in three weeks.

That’s the moment to investigate send frequency, campaign type, targeting and recent list changes, rather than waiting for the fourth or fifth week to confirm what the direction was already showing.

The better monitoring system therefore has three layers: 0.10% as the working ceiling, campaign-level segmentation to locate the source, and week-over-week movement as the early-warning system.

Doing all three manually means repeatedly pulling different cuts of the same deliverability data.

This kind of monitoring is exactly where connecting campaign data to the AI tools already in your workflow becomes useful.

Omnisend connects directly with ChatGPT and Claude, letting you interrogate campaign, automation and subscriber data without opening another dashboard, including checks designed to catch deliverability problems such as rising bounce rates before they start costing opens.

Its new guide breaks down 10 practical ways to run these checks and other email diagnostics with AI. Read the guide.

The number that gets a sender in trouble and the number associated with healthy placement are no longer necessarily the same.

Waiting for the first one means potentially discovering the problem long after the second one started warning you.

Together with Levanta

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🔄 Google and ChatGPT are feeding each other

ChatGPT is becoming a bigger source of B2B traffic, but Google remains an important gateway into ChatGPT itself. The emerging discovery journey looks less like AI replacing search and more like users moving between both.

The Breakdown:

1. ChatGPT Referrals Surge - Demandbase says monthly ChatGPT referrals to B2B sites jumped 303%, from 645K to 2.6M. Perplexity declined, while Gemini and Claude stayed flat.

2. Robots.txt Gets Murky - OpenAI says robots.txt may not apply to ChatGPT-User when a person requests a page. TollBit found it reached disallowed pages on more sites than comparable bots.

3. Google Feeds ChatGPT - Across 13.1B search events, ChatGPT ranked as Google’s sixth-most-clicked destination. Zero-click searches rose 2.6 points while organic clicks fell 2.8, but paid clicks remained stable.

4. Watermarks Become Optional - Google is adding a toggle to remove visible watermarks from Nano Banana, Omni, and Lyria outputs. SynthID and C2PA remain, while EU users still receive mandatory labels.

AI discovery isn’t creating a clean break from traditional search. ChatGPT increasingly sends traffic outward while simultaneously depending on Google for users, creating a more interconnected discovery ecosystem.

🗝️ Tweet of the Day

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