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B2B Email Marketing That Reaches the Inbox
Deliverability, bounces and warmup
This book is 100% completeLast updated on 2026-10-27
Deliverability, bounces, warmup and list hygiene, measured in a real B2B sending operation. Checked against the current Resend documentation.
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About
About the Book
Perfect SPF, DKIM and DMARC do not guarantee delivery. In the operation measured in this guide, authentication was correct and the bounce rate was still 5.84%, with 20% of messages deferred by the destination. This guide shows what to measure, how to read it and what to do, from a real B2B sending operation: authentication failures that pass validators, bounce versus complaint diagnosis, consumer versus corporate addresses, warmup schedules (updated to the official Resend schedule), campaign-level reading of bounce rates, one-click unsubscribe and tracking traps, SMTP versus API, and a before/after checklist. The provider limits quoted (bounce under 4%, spam under 0.08%) come from the current Resend documentation; internal thresholds are labeled as such. For marketing teams, small business owners and agencies that send B2B email. 14 pages, PDF.
Author
About the Author
Leandro Salerno
Leandro Salerno leads marketing and technology at Austhen, a Brazilian industrial audio group with 20+ years of engineering, behind the brands Sansara, IBS and Xcene.
He didn't learn AEO from a course — he learned it shipping real sites: building and optimizing the group's B2B catalogs in Next.js and Firebase, and fighting every indexation and schema bug documented in this book. After getting those sites cited by ChatGPT and Perplexity, he packaged the method into AEO in Practice.
He writes for developers and agencies who want to master the next layer of search before the competition does.
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