Workflow: automate with n8n workflow for Manual Mailgun Automate Triggered
Integrations: mailgun, manualTrigger

{"nodes": [{"name": "On clicking 'execute'", "type": "n8n-nodes-base.manualTrigger", "position": [250, 300], "parameters": {}, "typeVersion": 1}, {"name": "Mailgun", "type": "n8n-nodes-base.mailgun", "position": [450, 300], "parameters": {"text": "This is a test message ", "subject": "This is a Subject", "toEmail": "user2@example.com", "fromEmail": "user@example.com"}, "credentials": {"mailgunApi": "mailgun-creds"}, "typeVersion": 1}], "connections": {"On clicking 'execute'": {"main": [[{"node": "Mailgun", "type": "main", "index": 0}]]}}}