MimeKit and MailKit are popular fully-featured email frameworks for .NET
框架支持版本如下
Supports .NET 4.5, .NET 4.6, .NET 4.7, .NET 4.8, .NET 5.0, .NETStandard 2.0, Xamarin.Android, Xamarin.iOS, Windows Phone 8.1, and more.
MailKit是最风行且最强大的.NET邮件处理惩罚框架之一，下面为各人简朴先容MailKit的利用方法（IMAP为例）
1. 参考资料Github https://github.com/jstedfast/MailKit
2.焦点内容（IMAP为例）毗连邮箱
加密
client.Connect("imap.exmail.qq.com", 993, SecureSocketOptions.SslOnConnect);
不加密
client.Connect("imap.exmail.qq.com", 143, SecureSocketOptions.None);
登入邮箱
client.Authenticate(MAIL_NAME, MAIL_PASSWORD);
打开邮件文件夹
client.Inbox.Open(FolderAccess.ReadWrite);
读取文件
读取方法一：可以预先筛选邮件
search for messages where the Subject header contains either "MimeKit" or "MailKit" var query = SearchQuery.SubjectContains("MimeKit").Or(SearchQuery.SubjectContains("MailKit")); var uids = client.Inbox.Search(query);
读取方法二：读取所有邮件
var uids = client.Inbox.Search(SearchQuery.All);
邮件操纵
操纵邮件一：读取邮件标题
string subject = message.Subject; if (!subject.Contains("MimeKitDemo")) return;
操纵邮件二：读取正文
string body = message.TextBody ?? string.Empty; if (!body.Contains("MimeKitDemoBody")) return;
操纵邮件三：下载邮件附件
var attachments = message.Attachments; if (attachments.Any()) { foreach (var attachment in attachments) DownloadAttachment(attachment); } private static void DownloadAttachment(MimeEntity attachment) { if (attachment is MessagePart) { var fileName = attachment.ContentDisposition?.FileName; var rfc822 = (MessagePart)attachment; if (string.IsNullOrEmpty(fileName)) fileName = "attached-message.eml"; var path = Path.Combine(DIRECTORY, fileName); using (var stream = File.Create(path)) rfc822.Message.WriteTo(stream); } else { var part = (MimePart)attachment; var fileName = part.FileName; var path = Path.Combine(DIRECTORY, fileName); using (var stream = File.Create(path)) part.Content.DecodeTo(stream); } }
操纵邮件四：移动邮件（移动至删除文件夹）
client.Inbox.MoveTo(uid, client.GetFolder(SpecialFolder.Trash));
操纵邮件五：删除邮件 - 将邮件标志为删除、最后删除
client.Inbox.AddFlags(uid, MessageFlags.Deleted, true); client.Inbox.Expunge();
3.样例源码地点https://github.com/Impartsoft/Bins/tree/main/MailKitDemo
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