Very simple Human in the loop system email with AI e IMAP

工作流概述

这是一个包含16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": "Nvn78tMRNnKji7Fg",
  "meta": {
    "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
    "templateCredsSetupCompleted": true
  },
  "name": "Very simple Human in the loop system email with AI e IMAP",
  "tags": [],
  "nodes": [
    {
      "id": "271bb16f-9b62-41d9-ab76-114cd7ba915a",
      "name": "Email Trigger (IMAP)",
      "type": "n8n-nodes-base.emailReadImap",
      "position": [
        -1300,
        1340
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "imap": {
          "id": "k31W9oGddl9pMDy4",
          "name": "IMAP info@n3witalia.com"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "42d150d8-d574-49f9-9c0e-71a2cdea3b79",
      "name": "Markdown",
      "type": "n8n-nodes-base.markdown",
      "position": [
        -1040,
        1340
      ],
      "parameters": {
        "html": "={{ $json.textHtml }}",
        "options": {}
      },
      "typeVersion": 1
    },
    {
      "id": "e9498a60-0078-4581-b269-7ff552f4047a",
      "name": "Send Email",
      "type": "n8n-nodes-base.emailSend",
      "position": [
        920,
        1320
      ],
      "webhookId": "a79ae1b4-648c-4cb4-b6cd-04ea3c1d9314",
      "parameters": {
        "html": "={{ $('Set Email text').item.json.email }}",
        "options": {},
        "subject": "=Re: {{ $('Email Trigger (IMAP)').item.json.subject }}",
        "toEmail": "={{ $('Email Trigger (IMAP)').item.json.from }}",
        "fromEmail": "={{ $('Email Trigger (IMAP)').item.json.to }}"
      },
      "credentials": {
        "smtp": {
          "id": "hRjP3XbDiIQqvi7x",
          "name": "SMTP info@n3witalia.com"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "ab9f6ac3-2095-44df-aeba-2eab96ecf425",
      "name": "Email Summarization Chain",
      "type": "@n8n/n8n-nodes-langchain.chainSummarization",
      "position": [
        -780,
        1340
      ],
      "parameters": {
        "options": {
          "binaryDataKey": "={{ $json.data }}",
          "summarizationMethodAndPrompts": {
            "values": {
              "prompt": "=Write a concise summary of the following in max 100 words:

\"{{ $json.data }}\"

Do not enter the total number of words used.",
              "combineMapPrompt": "=Write a concise summary of the following in max 100 words:

\"{{ $json.data }}\"

Do not enter the total number of words used."
            }
          }
        },
        "operationMode": "nodeInputBinary"
      },
      "typeVersion": 2
    },
    {
      "id": "86b7c3d0-e1f2-4e2f-b293-8042700d6816",
      "name": "Write email",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        -340,
        1340
      ],
      "parameters": {
        "text": "=Write the text to reply to the following email:

{{ $json.response.text }}",
        "options": {
          "systemMessage": "You are an expert at answering emails. You need to answer them professionally based on the information you have. This is a business email. Be concise and never exceed 100 words. Only the body of the email, not create the subject"
        },
        "promptType": "define",
        "hasOutputParser": true
      },
      "typeVersion": 1.7
    },
    {
      "id": "5d5a397f-f9c3-4691-afd0-9a6102679eac",
      "name": "OpenAI",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        -400,
        1560
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4o-mini",
          "cachedResultName": "gpt-4o-mini"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "CDX6QM4gLYanh0P4",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "5b36a295-fda6-4174-9078-0a8ec57620d2",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -800,
        1260
      ],
      "parameters": {
        "width": 320,
        "height": 240,
        "content": "Chain that summarizes the received email"
      },
      "typeVersion": 1
    },
    {
      "id": "7110fe1f-0099-49aa-9095-96e733aa468f",
      "name": "Sticky Note5",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -360,
        1260
      ],
      "parameters": {
        "width": 340,
        "height": 240,
        "content": "Agent that retrieves business information from a vector database and processes the response"
      },
      "typeVersion": 1
    },
    {
      "id": "e2bdbd64-3c37-4867-ae2c-0f6937d82b81",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1100,
        1260
      ],
      "parameters": {
        "height": 240,
        "content": "Convert email to Markdown format for better understanding of LLM models"
      },
      "typeVersion": 1
    },
    {
      "id": "8ae5d216-5897-4c33-800a-27ff939b174a",
      "name": "Sticky Note7",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        620,
        1300
      ],
      "parameters": {
        "height": 180,
        "content": "If the feedback is OK send email"
      },
      "typeVersion": 1
    },
    {
      "id": "4cfce63c-5931-45c5-99ca-eb85dca962b5",
      "name": "Approve Email",
      "type": "n8n-nodes-base.emailSend",
      "position": [
        380,
        1340
      ],
      "webhookId": "4f9f06e7-9b2b-4896-9b51-245972341d12",
      "parameters": {
        "message": "=<h3>MESSAGE</h3>
{{ $('Email Trigger (IMAP)').item.json.textHtml }}

<h3>AI RESPONSE</h3>
{{ $json.email }}",
        "options": {},
        "subject": "=[Approval Required]  {{ $('Email Trigger (IMAP)').item.json.subject }}",
        "toEmail": "info@n3witalia.com",
        "fromEmail": "info@n3witalia.com",
        "operation": "sendAndWait"
      },
      "credentials": {
        "smtp": {
          "id": "hRjP3XbDiIQqvi7x",
          "name": "SMTP info@n3witalia.com"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "d6c8acd2-ebc1-4aaa-bfcc-cdb18fcc8715",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        -820,
        1560
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "deepseek-chat",
          "cachedResultName": "deepseek-chat"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "97Cz4cqyiy1RdcQL",
          "name": "DeepSeek"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "33bbedeb-129a-4e99-ab5a-9e0ec4456156",
      "name": "Set Email text",
      "type": "n8n-nodes-base.set",
      "position": [
        100,
        1340
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "35d7c303-42f4-4dd1-b41e-6eb087c23c3d",
              "name": "email",
              "type": "string",
              "value": "={{ $json.output }}"
            }
          ]
        }
      },
      "typeVersion": 3.4
    },
    {
      "id": "2293e0e6-4f2a-4622-a610-64b65f34e1e5",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        320,
        1300
      ],
      "parameters": {
        "height": 180,
        "content": "Human in the loop"
      },
      "typeVersion": 1
    },
    {
      "id": "510196ec-adaf-4e6c-aac0-8ca8b754438a",
      "name": "Sticky Note11",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1100,
        940
      ],
      "parameters": {
        "color": 3,
        "width": 540,
        "height": 260,
        "content": "# How it works
This workflow automates the handling of incoming emails, summarizes their content, generates appropriate responses and validate it through send IMAP email with \"Human in the loop\" system. 

You can quickly integrate Gmail and Outlook via the appropriate nodes"
      },
      "typeVersion": 1
    },
    {
      "id": "c4c9157d-4d05-47a1-a5eb-63865e838d39",
      "name": "Approved?",
      "type": "n8n-nodes-base.if",
      "position": [
        680,
        1340
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "62e26bc5-1732-4699-a602-99490c7406fd",
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              },
              "leftValue": "={{ $json.data.approved }}",
              "rightValue": ""
            }
          ]
        }
      },
      "typeVersion": 2.2
    }
  ],
  "active": false,
  "pinData": {},
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "47e79286-00f4-48e8-a0d1-e0f56d9ba0d5",
  "connections": {
    "OpenAI": {
      "ai_languageModel": [
        [
          {
            "node": "Write email",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Markdown": {
      "main": [
        [
          {
            "node": "Email Summarization Chain",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Approved?": {
      "main": [
        [
          {
            "node": "Send Email",
            "type": "main",
            "index": 0
          }
        ],
        []
      ]
    },
    "Write email": {
      "main": [
        [
          {
            "node": "Set Email text",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Approve Email": {
      "main": [
        [
          {
            "node": "Approved?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Set Email text": {
      "main": [
        [
          {
            "node": "Approve Email",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "Email Summarization Chain",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Email Trigger (IMAP)": {
      "main": [
        [
          {
            "node": "Markdown",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Email Summarization Chain": {
      "main": [
        [
          {
            "node": "Write email",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

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

  • Emailreadimap
  • Markdown
  • Emailsend
  • @N8N/N8N Nodes Langchain.Chainsummarization
  • @N8N/N8N Nodes Langchain.Agent

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