Send Gmail Emails with Custom Aliases & Attachments via API

This n8n workflow enables sending personalized Gmail emails with custom 'From' aliases and attachments directly through the Gmail API using an HTTP Request node, combined with a Code node for formatting. It acts as a flexible API endpoint or sub-workflow, accepting a POST payload specifying sender details, recipient, subject, HTML body, and file URLs for attachments. Required fields include fromEmail, toEmail, subject, and htmlBody, making it straightforward to integrate into larger automations.

Key benefits include overcoming restrictions in n8n's native Gmail node for aliases, ensuring emails appear from branded or team-specific addresses while using your primary Gmail OAuth credentials. Attachments are handled efficiently from public URLs, reducing workflow complexity. This saves significant time for repetitive email tasks, with robust error handling and easy customization.

Perfect for real estate professionals in showing scheduling: automate confirmation emails, reminders, or follow-ups with property attachments, customized sender names (e.g., 'John Doe - Showings Team'), and reply-to addresses. Use as a webhook-triggered endpoint in CRM integrations or convert to a sub-workflow for chaining with calendars, lead management, or property listing tools.