Marketing Against The Grain

I Built a Team of AI Assistants That Live in My Email Inbox (Mail Manus Tutorial)

32 snips
Feb 24, 2026
A deep dive into building inbox-native AI assistants for tasks like competitive research, content strategy, and data analysis. A walkthrough shows how custom email agents can auto-process competitor launches and newsletters. Practical setups cover Gmail filters, auto-forwarding, and workflows that return briefs and ranked content ideas directly to your inbox.
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INSIGHT

Build Specialist AI Agents Inside Your Inbox

  • You can build specialized AI assistants that live as dedicated email addresses inside your inbox.
  • Kieran demonstrates MailManus agents that accept forwarded emails, do work, and reply with completed outputs like briefs or PDFs.
ADVICE

Give Each Agent Its Own Email Address

  • Create bespoke email addresses for each AI task you want automated and forward relevant emails to them.
  • Kieran uses separate agents for deal flow, competitive analysis, and content repurposing to keep outputs focused and shareable.
ANECDOTE

Airtable Launch Turned Into A Ready Competitor Brief

  • Kieran forwarded articles on Airtable's launch to his Manus agent and received a full competitor brief back by email.
  • The agent acknowledged the task, extracted information from multiple articles, and returned a PDF brief ready to forward to stakeholders.
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