Email Classification

工作流概述

这是一个包含15个节点的复杂工作流,主要用于自动化处理各种任务。

工作流源代码

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{
  "id": "m8gr0YZgCx5Qrsia",
  "meta": {
    "instanceId": "b795c85ef5703ecdc784a39956949c45a099b0c52b9adbeeed744965b5aed696",
    "templateCredsSetupCompleted": true
  },
  "name": "(G) - Email Classification",
  "tags": [],
  "nodes": [
    {
      "id": "0226578d-4741-42f2-8a7b-c750f75be78d",
      "name": "Gmail Trigger",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        0,
        0
      ],
      "parameters": {
        "simple": false,
        "filters": {},
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "YNdPYS7HyXbJjy7l",
          "name": "Gmail account (jkp@kajonkietsuksa.ac.th)"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "48d0ee27-d4d6-4db4-843c-d9c18b934945",
      "name": "Google Gemini Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
      "position": [
        220,
        320
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-2.0-flash-001"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "ZK3aD9k31PG9XVBd",
          "name": "Guitar's Gemini (babystoreroom@gmail.com)"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "d7e8bed4-cadc-41e3-b793-cc8affb177cc",
      "name": "AI Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "disabled": true,
      "position": [
        1420,
        60
      ],
      "parameters": {
        "text": "=Here's the email context: {{ $('Classification Agent').item.json.text }}",
        "options": {
          "systemMessage": "You are my personal assistant for Kajonkietsuksa School.
Your role is to help me with any work-related tasks.
One of your main responsibilities is to write professional and polite reply emails whenever I receive an email in my inbox. Act as me, don't include something like \"here's a potential reply email or other\"

When writing a reply email:

Start by acknowledging the sender's message.

Answer their questions or address their requests clearly and directly.

Maintain a polite, professional, and helpful tone.

Keep the language simple and easy to understand.

If additional action is required from me, mention that I will get back to them soon.

Always end the email with a courteous closing line, such as \"Thank you\" or \"Best regards.\"

Keep your writing style consistent with a warm yet formal communication style that reflects the reputation of Kajonkietsuksa School.

"
        },
        "promptType": "define"
      },
      "typeVersion": 1.8
    },
    {
      "id": "3b5cabb7-346f-4b69-b3f4-c61e78e2d8c7",
      "name": "Groq Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatGroq",
      "disabled": true,
      "position": [
        1440,
        180
      ],
      "parameters": {
        "model": "meta-llama/llama-4-scout-17b-16e-instruct",
        "options": {}
      },
      "credentials": {
        "groqApi": {
          "id": "ssFnosV0K9CllUnY",
          "name": "(G) Groq account (jkp@kajonkietsuksa.ac.th)"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "43984fb2-7a26-4e13-95ee-c29f0d9f2f24",
      "name": "Gmail3",
      "type": "n8n-nodes-base.gmail",
      "disabled": true,
      "position": [
        1780,
        60
      ],
      "webhookId": "64df877a-5475-447d-860b-b62d4418d841",
      "parameters": {
        "message": "={{ $json.output }}",
        "options": {},
        "subject": "=Re: {{ $('Gmail Trigger').item.json.headers.subject }}",
        "resource": "draft"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "YNdPYS7HyXbJjy7l",
          "name": "Gmail account (jkp@kajonkietsuksa.ac.th)"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "c269ec5e-f882-4458-ab52-46b719731309",
      "name": "Classification Agent",
      "type": "@n8n/n8n-nodes-langchain.textClassifier",
      "position": [
        240,
        0
      ],
      "parameters": {
        "options": {
          "systemPromptTemplate": "Please classify the text provided by the user into one of the following categories: {categories}, and use the provided formatting instructions below. Don't explain, and only output the json."
        },
        "inputText": "={{ $json.text || $json.html }}",
        "categories": {
          "categories": [
            {
              "category": "High Priority",
              "description": "Emails requiring immediate attention or action, typically from key stakeholders, clients, or decision-makers. These emails often contain time-sensitive requests, deadlines, or escalated issues. Keywords: urgent, ASAP, immediate, deadline, action required, high priority"
            },
            {
              "category": "KS Work Related",
              "description": "Anything related to my school or education. Keyword: Kajonkietsuksa School, Kajonkietsuksa, School"
            },
            {
              "category": "Promotion",
              "description": "Anything related to updating on promotions. Keywords: newsletter, promotion, offer, sale, campaign, marketing, launch"
            },
            {
              "category": "Other",
              "description": "If you don't know what category is this email."
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "id": "17be38df-c225-4d19-81ec-e205ff4b9f3c",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        60,
        260
      ],
      "parameters": {
        "color": 4,
        "width": 300,
        "height": 80,
        "content": "### 2) Change to your desire LLMs"
      },
      "typeVersion": 1
    },
    {
      "id": "3e8ac267-c2ac-49cb-ad53-536510faa1a4",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -80,
        -60
      ],
      "parameters": {
        "color": 4,
        "content": "### 1) Change to your gmail's credential"
      },
      "typeVersion": 1
    },
    {
      "id": "f5e2c92d-3335-4ed0-915e-f7edeb0b5a92",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        220,
        -380
      ],
      "parameters": {
        "color": 4,
        "width": 340,
        "content": "### 3) Login to your gmail inbox
* Create a label with \"+\" icon
* Change the color of your choice"
      },
      "typeVersion": 1
    },
    {
      "id": "4a8a7424-f9dd-42b1-b803-5d0dbe076956",
      "name": "Sticky Note3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        220,
        -160
      ],
      "parameters": {
        "color": 4,
        "width": 320,
        "content": "### 4) Agent instruction
* Input the category name that you just created in gmail.
* Description = Tell agent about how should it classify your email. Keywords can be useful to let your agent classify the email context."
      },
      "typeVersion": 1
    },
    {
      "id": "24c7ef4e-7a68-4240-980b-02b994300084",
      "name": "Add Label Promotion",
      "type": "n8n-nodes-base.gmail",
      "position": [
        700,
        200
      ],
      "webhookId": "4e089f5f-58ea-4c8d-8870-3d155a81f0b7",
      "parameters": {
        "labelIds": [
          "Label_4917715854276709190"
        ],
        "messageId": "={{ $json.id }}",
        "operation": "addLabels"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "YNdPYS7HyXbJjy7l",
          "name": "Gmail account (jkp@kajonkietsuksa.ac.th)"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "759f8cbe-4674-49e5-a52b-2acf208ffb22",
      "name": "Add Label (KS Work Related)",
      "type": "n8n-nodes-base.gmail",
      "position": [
        700,
        0
      ],
      "webhookId": "4e089f5f-58ea-4c8d-8870-3d155a81f0b7",
      "parameters": {
        "labelIds": [
          "Label_4956837555783205638"
        ],
        "messageId": "={{ $json.id }}",
        "operation": "addLabels"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "YNdPYS7HyXbJjy7l",
          "name": "Gmail account (jkp@kajonkietsuksa.ac.th)"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "d07fe962-16c0-401a-b194-5ce7e6ad9746",
      "name": "Add Label (High Priority)",
      "type": "n8n-nodes-base.gmail",
      "position": [
        700,
        -200
      ],
      "webhookId": "4e089f5f-58ea-4c8d-8870-3d155a81f0b7",
      "parameters": {
        "labelIds": [
          "Label_3750994713301985229"
        ],
        "messageId": "={{ $json.id }}",
        "operation": "addLabels"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "YNdPYS7HyXbJjy7l",
          "name": "Gmail account (jkp@kajonkietsuksa.ac.th)"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "7d0c9bd5-6150-4afa-9344-8bb3c1a6b01c",
      "name": "Sticky Note4",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        660,
        -320
      ],
      "parameters": {
        "color": 4,
        "width": 320,
        "content": "### 5) Add Label Nodes
* In this option \"Label Names or IDs\" -> Select the category to match with the Classification Agent Node."
      },
      "typeVersion": 1
    },
    {
      "id": "d57ecacb-a479-4bf7-b9b4-b9e14e30dcd7",
      "name": "Sticky Note5",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        980,
        60
      ],
      "parameters": {
        "color": 4,
        "width": 220,
        "content": "### 6) Add-on
* You can add more category of your choice!"
      },
      "typeVersion": 1
    }
  ],
  "active": true,
  "pinData": {},
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "c94df4ec-be75-449f-82fa-4e1f8878104a",
  "connections": {
    "AI Agent": {
      "main": [
        [
          {
            "node": "Gmail3",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Gmail Trigger": {
      "main": [
        [
          {
            "node": "Classification Agent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Groq Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "AI Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Classification Agent": {
      "main": [
        [
          {
            "node": "Add Label (High Priority)",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Add Label (KS Work Related)",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Add Label Promotion",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Google Gemini Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "Classification Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Add Label (KS Work Related)": {
      "main": [
        []
      ]
    }
  }
}

功能特点

  • 自动检测新邮件
  • AI智能内容分析
  • 自定义分类规则
  • 批量处理能力
  • 详细的处理日志

技术分析

节点类型及作用

  • Gmailtrigger
  • @N8N/N8N Nodes Langchain.Lmchatgooglegemini
  • @N8N/N8N Nodes Langchain.Agent
  • @N8N/N8N Nodes Langchain.Lmchatgroq
  • Gmail

复杂度评估

配置难度:
★★★★☆
维护难度:
★★☆☆☆
扩展性:
★★★★☆

实施指南

前置条件

  • 有效的Gmail账户
  • n8n平台访问权限
  • Google API凭证
  • AI分类服务订阅

配置步骤

  1. 在n8n中导入工作流JSON文件
  2. 配置Gmail节点的认证信息
  3. 设置AI分类器的API密钥
  4. 自定义分类规则和标签映射
  5. 测试工作流执行
  6. 配置定时触发器(可选)

关键参数

参数名称 默认值 说明
maxEmails 50 单次处理的最大邮件数量
confidenceThreshold 0.8 分类置信度阈值
autoLabel true 是否自动添加标签

最佳实践

优化建议

  • 定期更新AI分类模型以提高准确性
  • 根据邮件量调整处理批次大小
  • 设置合理的分类置信度阈值
  • 定期清理过期的分类规则

安全注意事项

  • 妥善保管API密钥和认证信息
  • 限制工作流的访问权限
  • 定期审查处理日志
  • 启用双因素认证保护Gmail账户

性能优化

  • 使用增量处理减少重复工作
  • 缓存频繁访问的数据
  • 并行处理多个邮件分类任务
  • 监控系统资源使用情况

故障排除

常见问题

邮件未被正确分类

检查AI分类器的置信度阈值设置,适当降低阈值或更新训练数据。

Gmail认证失败

确认Google API凭证有效且具有正确的权限范围,重新进行OAuth授权。

调试技巧

  • 启用详细日志记录查看每个步骤的执行情况
  • 使用测试邮件验证分类逻辑
  • 检查网络连接和API服务状态
  • 逐步执行工作流定位问题节点

错误处理

工作流包含以下错误处理机制:

  • 网络超时自动重试(最多3次)
  • API错误记录和告警
  • 处理失败邮件的隔离机制
  • 异常情况下的回滚操作