public class EmailHelp
{
/// <summary>
/// Smtp服务器地址
/// </summary>
private static readonly string SmtpServer = ConfigurationManager.AppSettings["SmtpServer"];
/// <summary>
/// Pop服务器地址
/// </summary>
private static readonly string PopServer = ConfigurationManager.AppSettings["PopServer"];
/// <summary>
/// Imap服务器地址
/// </summary>
private static readonly string ImapServer = ConfigurationManager.AppSettings["ImapServer"];
/// <summary>
/// SMTP端口
/// </summary>
private static readonly int SmtpPort = int.Parse(ConfigurationManager.AppSettings["SmtpPort"]);
/// <summary>
/// POP端口
/// </summary>
private static readonly int PopPort = int.Parse(ConfigurationManager.AppSettings["PopPort"]);
/// <summary>
/// IMAP端口
/// </summary>
private static readonly int ImapPort = int.Parse(ConfigurationManager.AppSettings["ImapPort"]);
/// <summary>
/// 邮件发送
/// </summary>
/// <param name="mailFromAccount">发送邮箱账号</param>
/// <param name="mailPassword">发送邮箱密码</param>
/// <param name="message">邮件</param>
public static void SendEmali(string mailFromAccount, string mailPassword, MimeMessage message)
{
using (var client = new MailKit.Net.Smtp.SmtpClient())
{
client.Connect(SmtpServer, SmtpPort, false);
// Note: since we don't have an OAuth2 token, disable
// the XOAUTH2 authentication mechanism.
client.AuthenticationMechanisms.Remove("XOAUTH2");
// Note: only needed if the SMTP server requires authentication
client.Authenticate(mailFromAccount, mailPassword);
client.Send(message);
client.Disconnect(true);
}
}
/// <summary>
/// 创建文本消息
/// </summary>
/// <param name="fromAddress">发件地址</param>
/// <param name="toAddressList">收件地址</param>
/// <param name="title">标题</param>
/// <param name="content">内容</param>
/// <param name="IsPostFiles">是否将POST上传文件加为附件</param>
/// <returns></returns>
public static MimeMessage CreateTextMessage(MailboxAddress fromAddress, IList<MailboxAddress> toAddressList
, string title, string content, bool IsPostFiles = false)
{
var message = new MimeMessage();
message.From.Add(fromAddress);
message.To.AddRange(toAddressList);
message.Subject = title; //设置消息的主题
var html = new TextPart("html")
{
Text = content,
};
var alternative = new Multipart("alternative");
alternative.Add(html);
var multipart = new Multipart("mixed");
multipart.Add(alternative);
if (IsPostFiles)
{
IList<MimePart> multiPartList = GetMimePartList();
foreach (var item in multiPartList)
{
multipart.Add(item);
}
}
message.Body = multipart;
return message;
}
/// <summary>
/// 收邮件
/// </summary>
/// <param name="mailFromAccount">发送邮箱账号</param>
/// <param name="mailPassword">发送邮箱密码</param>
/// <param name="searchQuery">查询条件</param>
/// <param name="folderName">文件夹名称</param>
/// <returns></returns>
public static IList<IMessageSummary> ReceiveEmail(string mailFromAccount, string mailPassword, string folderName, SearchQuery searchQuery = null)
{
//打开收件箱
var folder = OpenFolder(mailFromAccount, mailPassword, folderName);
//IList<OrderBy> orderByList = new List<OrderBy> { OrderBy.Date };
//查询所有的邮件
var uidss = folder.Search(searchQuery);
IList<IMessageSummary> msgList = new List<IMessageSummary>();
if (uidss.Count > 0)//判断是否查询到邮件
{
//获取邮件头
msgList = folder.Fetch(uidss, MessageSummaryItems.UniqueId | MessageSummaryItems.Full);
}
folder.Close();
return msgList;
}
/// <summary>
/// 根据唯一号查询信件
/// </summary>
/// <param name="mailFromAccount">邮箱账号</param>
/// <param name="mailPassword">邮箱密码</param>
/// <param name="id">唯一号</param>
/// <param name="folderName">文件夹名称</param>
/// <returns></returns>
public static MimeMessage GetEmailByUniqueId(string mailFromAccount, string mailPassword, uint id, string folderName)
{
//打开收件箱
var folder = OpenFolder(mailFromAccount, mailPassword, folderName);
UniqueId emailUniqueId = new UniqueId(id);
MimeMessage message = folder.GetMessage(emailUniqueId);
/*将邮件设为已读*/
MessageFlags flags = MessageFlags.Seen;
folder.SetFlags(emailUniqueId, flags, true);
return message;
}
/// <summary>
/// 读取上传的文件
/// </summary>
/// <returns></returns>
public static IList<MimePart> GetMimePartList()
{
IList<MimePart> mimePartList = new List<MimePart>();
var current = HttpContext.Current;
if (current != null)
{
HttpRequest request = current.Request;
HttpFileCollection files = request.Files;
int filesCount = files.Count;
for (int i = 0; i < filesCount; i++)
{
HttpPostedFile item = files[i];
MimePart attachment = new MimePart(item.ContentType)
{
ContentObject = new ContentObject(item.InputStream, ContentEncoding.Default),
ContentDisposition = new ContentDisposition(ContentDisposition.Attachment),
ContentTransferEncoding = ContentEncoding.Base64,
FileName = item.FileName
};
mimePartList.Add(attachment);
}
}
return mimePartList;
}
/// <summary>
/// 打开邮箱文件夹
/// </summary>
/// <param name="mailFromAccount">邮箱账号</param>
/// <param name="mailPassword">邮箱密码</param>
/// <param name="folderName">文件夹名称(INBOX:收件箱名称)</param>
/// <returns></returns>
public static IMailFolder OpenFolder(string mailFromAccount, string mailPassword, string folderName)
{
ImapClient client = new ImapClient();
client.Connect(ImapServer, ImapPort);
client.Authenticate(mailFromAccount, mailPassword);
//获取所有文件夹
//List<IMailFolder> mailFolderList = client.GetFolders(client.PersonalNamespaces[0]).ToList();
var folder = client.GetFolder(folderName);
//打开文件夹并设置为读的方式
folder.Open(MailKit.FolderAccess.ReadWrite);
return folder;
}
/// <summary>
/// 下载邮件附件
/// </summary>
/// <param name="mimePart"></param>
public static void DownFile(MimePart mimePart)
{
HttpContext context = HttpContext.Current;
// 设置编码和附件格式
context.Response.ContentType = mimePart.ContentType.ToString();
//context.Response.ContentEncoding = Encoding.UTF8;
context.Response.Charset = "";
string fileName = HttpUtility.UrlEncode(mimePart.FileName, Encoding.UTF8);
context.Response.AppendHeader("Content-Disposition",
"attachment;filename=" + fileName);
using (MemoryStream ms = new MemoryStream())
{
mimePart.ContentObject.DecodeTo(ms);
ms.Flush();
ms.Position = 0;
context.Response.BinaryWrite(ms.GetBuffer());
context.Response.End();
}
}
}
