A counterintuitive email marketing test is to have no preheader text. This creates visual whitespace in the recipient's inbox, making the email stand out from the clutter and potentially boosting open rates by up to 15%. A simple code snippet, which can be sourced from ChatGPT, is needed to prevent clients from auto-filling the space.

Medium's CEO argues the true measure of success against spam is not the volume of "AI slop" received, but how little reaches end-users. The fight is won through sophisticated recommendation and filtering algorithms that protect the reader experience, rather than just blocking content at the source.

Email providers prioritize senders with high engagement. Sending at least five emails per month generates more opens and clicks, signaling credibility. This counterintuitively leads to higher average open rates and better inbox placement, contrary to the common fear of over-sending.

Focusing on email open rates can lead to clickbait subject lines and weak copy. Instead, orient your entire outreach strategy around getting a reply. This forces you to write more personalized, engaging content that addresses the recipient's specific pain points, leading to actual conversations, not just vanity metrics.

SaaStr tested both disclosing and hiding that their outreach came from AI agents and found it made no difference in response rates. As long as the email is relevant and useful, prospects are willing to engage, proving that value trumps the human-versus-AI distinction in sales communication.

Social media algorithms are fickle and AI summaries are reducing referral traffic from search. Email newsletters are thriving because they provide a direct, reliable communication channel where creators truly own their audience and distribution, hedging against unpredictable platforms.

Leverage AI in email marketing not to replace your voice, but to augment it. Use tools like ChatGPT as a brainstorming partner to generate angles and outlines. This frees up your creative energy to focus on infusing the content with personal stories and genuine connection that only a human can provide.

Instead of asking an LLM to generate a full email, create a workflow where it produces individual sections, each with its own specific strategy and prompt. A human editor then reviews the assembled piece for tone and adds "spontaneity elements" like GIFs or timely references to retain a human feel.

Despite claims that Apple's privacy changes and bots have made them irrelevant, open rates remain a valuable leading indicator for email performance. Marketers who dismiss them are ignoring a crucial signal of audience engagement and list health. These metrics are provided by platforms and should be monitored.