如何在 ASP.NET Core 中列出来自特殊帐户的传入电子邮件

Question

我正在使用 MailKit 接收电子邮件。

这是我的代码：

using (var emailClient = new Pop3Client())
 {
            emailClient.Connect(settings.HostMail, 110);
            emailClient.Authenticate(settings.UsernameEmail, settings.PasswordEmail);

            List<EmailMessageDTO> emails = new List<EmailMessageDTO>();
            for (int i = 0; i < emailClient.Count; i++)
            {
                var message = emailClient.GetMessage(i);
                var emailMessage = new EmailMessageDTO();


                emailMessage.MessageHtml = !string.IsNullOrEmpty(message.HtmlBody) ? message.HtmlBody : message.TextBody;
                emailMessage.Subject = message.Subject;

                emailMessage.To = new List<DTO.Address>();
                emailMessage.To.AddRange(message.To.Select(x => (MailboxAddress)x).Select(x => new DTO.Address { Email = x.Address, Name = x.Name }));
                var sender = message.From.Select(x => (MailboxAddress)x).Select(x => new DTO.Address { Email = x.Address, Name = x.Name }).FirstOrDefault();
                emailMessage.From = new DTO.Address { Email = sender.Email, Name = sender.Name };
               if(emailMessage.From.Name == "Ali")
                {
                    emails.Add(emailMessage);
                }
                
            }
}

问题是上面的代码循环获取所有邮件，然后搜索从一个特殊帐户收到的电子邮件。有什么方法可以列出从帐户收到的电子邮件，而无需在 for 循环中获取所有电子邮件？

Answer 1

POP3协议非常基础，不支持任何方式的搜索。 IMAP 协议对于你想做的事情来说是一个更好的协议，但如果你没有那个选项，你可以（可能）通过只下载 headers 来提高你的应用程序的网络性能，以便做你的过滤，如果匹配，则下载完整消息。

例如：

for (int i = 0; i < emailClient.Count; i++)
{
    var headers = emailClient.GetMessageHeaders(i);
    if (!headers.TryGetValue (HeaderId.From, out var header))
        continue;

    if (!InternetAddressList.TryParse (header.RawValue, out var addrList))
        continue;

    var sender = addrList.Mailboxes.FirstOrDefault ();
    if (sender == null || sender.Name != "Ali")
        continue;

    var message = emailClient.GetMessage(i);
    var emailMessage = new EmailMessageDTO();

    emailMessage.MessageHtml = !string.IsNullOrEmpty(message.HtmlBody) ? message.HtmlBody : message.TextBody;
    emailMessage.Subject = message.Subject;

    emailMessage.To = new List<DTO.Address>();
    emailMessage.To.AddRange(message.To.Select(x => (MailboxAddress)x).Select(x => new DTO.Address { Email = x.Address, Name = x.Name }));
    emailMessage.From = new DTO.Address { Email = sender.Address, Name = sender.Name };

    emails.Add(emailMessage);
}

如何在 ASP.NET Core 中列出来自特殊帐户的传入电子邮件

How to list incoming emails from a special account in ASP.NET Core

c#

asp.net-core

pop3

mailkit