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Readme
n8n-nodes-gmail-custom
Custom Gmail node for n8n with token caching and 429 retry.
A drop-in replacement for the native Gmail v2 Send operation, optimized for service account usage with domain-wide delegation.
Features
- Same UI as native Gmail Send (To, Subject, Email Type, Message, Options with CC/BCC/ReplyTo/Attachments)
- Token caching — access token is reused across calls (1 auth call per hour instead of per email)
- 429 retry — automatic retry with exponential backoff when rate limited
- From Email inline — specify the delegated user directly in the node (no need to set in credential)
- No extra API calls (no GET /profile like the native node)
Installation
In n8n: Settings → Community Nodes → Install → Enter n8n-nodes-gmail-custom
Usage
- Add a Gmail Custom node to your workflow
- Select your Google API credential (service account)
- Fill in:
- From Email: the delegated user to send as (e.g.
segreteria.a@domain.com) - To: recipient(s)
- Subject: email subject
- Email Type: Text or HTML
- Message: email body
- From Email: the delegated user to send as (e.g.
- Configure advanced Options as needed (CC, BCC, ReplyTo, Attachments)
License
MIT