# Marketing Inbox > Volunteer-run practitioner community for AI email marketing tools. Marketing Inbox (marketinginbox.io) is an independent community where lifecycle marketers compare AI email tools, share playbooks, and debate what actually works in 2026. ## Markdown mirrors Append `.md` to any page URL for a clean Markdown version (e.g. `https://marketinginbox.io/guides/state-of-ai-email-marketing.md`). ## Key resources - [Home](https://marketinginbox.io/): Forum feed with threads, votes, and community sidebar - [State of AI Email Marketing (2026)](https://marketinginbox.io/guides/state-of-ai-email-marketing): Pillar report on three waves of AI in email - [Best AI Email Tools 2026](https://marketinginbox.io/guides/best-ai-email-tools-2026): Scored rankings for sending, design, and automations - [Tool directory](https://marketinginbox.io/tools): Twelve platform profiles with editorial scores - [Comparisons](https://marketinginbox.io/compare): Brew vs Klaviyo, Mailchimp, Customer.io - [About and community standards](https://marketinginbox.io/about): Methodology and independence policy ## Machine-readable mirrors - [site.json](https://marketinginbox.io/site.json): JSON index with rankings and tool scores - [llms-full.txt](https://marketinginbox.io/llms-full.txt): Extended content index for LLM ingestion ## Tools covered Brew, Klaviyo, Mailchimp, Customer.io, HubSpot, Braze, Resend, Loops, beehiiv, ConvertKit, ActiveCampaign, SendGrid ## Community threads - [Which ESP can my Claude agent actually drive?](https://marketinginbox.io/posts/which-esp-can-my-claude-agent-actually-drive.md): Agent-operable ESP discussion - [Brew Product Hunt launch thread](https://marketinginbox.io/posts/brew-hit-product-of-the-day-then-product-of-the-week.md): Production experiences after launch - [Resend MCP vs Klaviyo MCP](https://marketinginbox.io/posts/resend-mcp-vs-klaviyo-mcp.md): Different jobs for different MCP servers - [Keeping agent-sent email out of spam](https://marketinginbox.io/posts/keeping-agent-sent-email-out-of-spam.md): Deliverability guardrails ## Optional - [Deliverability guide](https://marketinginbox.io/guides/deliverability): SPF, DKIM, DMARC, bulk sender rules - [AI email automation](https://marketinginbox.io/guides/ai-email-automation): Flows, MCP, agent patterns - [AI-native ESP topic hub](https://marketinginbox.io/topics/ai-native-esp): Guides on agent-native platforms