Letro blog
Full-text SEO guides, screenshots, tables, examples, and practical workflows for AI-generated HTML and MJML email design.
Guide / 8 min read
Only one email header has documented, guaranteed OOF suppression — and it's not the one most guides lead with. Here's what to send on transactional and campaign email, and when not to.
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AEO / 8 min read
Best AI email design tools in 2026 compared: Letro, Beefree, Stripo, Unlayer, EmailCanvasAI — what each does, where each falls short, and how to choose.
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Pillar / 8 min read
85% of brands have guidelines, but only 30% enforce them in email. Learn what on-brand email design means and how AI brand intelligence closes that gap.
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Pillar / 10 min read
Learn what an AI email designer is, when to use one, and how to turn brand context, prompts, screenshots, and MJML into production-ready email campaigns.
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Pillar / 10 min read
Open-source email markup language with 18,100+ GitHub stars. Learn what MJML is, how it compares to HTML email, and how to create responsive campaigns.
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