n8n Gmail AI Memory: Persistent Memory for Gmail Workflows

Add Gmail memory to n8n in 3 steps

n8n Gmail memory — frequently asked questions

How do I scope Gmail memory per sender in n8n?

Use the sender email address as the namespace: email:{from_email}. This scopes each sender's memory completely separately. Map the From field from the Gmail Trigger payload to the namespace in both the search and store nodes.

Can I use this to build an AI email reply assistant in n8n?

Yes. The pattern: Gmail Trigger → retainr Search Memory (sender history) → OpenAI (draft reply with context) → retainr Store Memory (log this email) → Gmail (send reply or save draft). The AI knows this sender's history, preferences, and past issues on every email.

What should I store in Gmail memory?

Store: the email subject and body summary, any commitments made (delivery dates, prices quoted), the sender category (lead, customer, partner), and the action taken. Avoid storing full email bodies if they contain sensitive data.

How do I handle email threads vs individual emails?

For threads, use the thread ID as the namespace: thread:{thread_id}. This scopes memory per conversation thread. For single sender history across all threads, use email:{sender_email}. Both approaches work — choose based on whether you need thread context or sender context.

Does this work with n8n Cloud Gmail integration?

Yes. The Gmail Trigger and Gmail nodes in n8n Cloud work identically with the retainr community node. Connect Gmail via OAuth in n8n credentials, and add retainr credentials separately. Both work on n8n Cloud Starter and above.