Read email using C# and POP3 protocols

question:

How to read emails using C#?

background:

• I need to use C# 2.0.
• The solution I'm currently using is not ideal as it doesn't support Unicode email.

Answer:

A reliable solution is to use the OpenPop.NET library. Here is how to use it:

1. Installation library: Using NuGet, run the following command:

Install-Package OpenPop.NET

2. Create a POP3 client:

using OpenPop.Pop3;
...
Pop3Client client = new Pop3Client();

3. Connect to POP3 server:
]

client.Connect("pop.example.com", 110, false); // 使用SSL进行安全连接

4. User authentication:

client.Authenticate("用户名", "密码");

5. Read email:

IList messages = client.GetMessages();
foreach (Pop3Message message in messages)
{
    // 获取邮件头信息
    Console.WriteLine("主题: {0}", message.Headers.Subject);

    // 获取邮件正文（包括附件）
    message.Load();
    Console.WriteLine("正文: {0}", message.MessagePart.BodyAsText);

    // 将邮件保存到本地文件
    message.SaveToFile("email.txt");
}

6. Release client resources:

client.Dispose();

Note: In order to support Unicode, please make sure your system supports UTF-8 encoding.