private static void SendSimpleMail()
{//1.创建一封邮件对象MailMessage mail=new MailMessage();mail.Subject = "我是邮件的主题";mail.SubjectEncoding = Encoding.UTF8;mail.Body = "我是邮件的正文";mail.BodyEncoding = Encoding.UTF8;//发件人mail.From=new MailAddress(lisi@163.com,"李小四");//收件人mail.To.Add(new MailAddress(wangwu@163.com,"王小五"));//2.创建一个发送邮件的类SmtpClient client=new SmtpClient("127.0.0.1");client.Credentials=new NetworkCredential("lisi@163.com","lisi");client.Send(mail);Console.WriteLine("ok");
}

private static void SendHtmlMail()
{//1.创建一封邮件对象MailMessage mail = new MailMessage();mail.Subject = "我是邮件的主题";mail.SubjectEncoding = Encoding.UTF8;mail.Body = "我是邮件的正文";mail.BodyEncoding = Encoding.UTF8;//发件人mail.From = new MailAddress("lisi@163.com", "李四");//收件人mail.To.Add(new MailAddress("wangwu@163.com", "王五"));//-----------------------------------------------------------//设置该邮件的格式为htmlAlternateView htmlBody = AlternateView.CreateAlternateViewFromString("你好<font colof='red' size=7>中国</font><hr/>", null, "text/html");//将该html内容添加 到邮件中
    mail.AlternateViews.Add(htmlBody);//-----------------------------------------------------------//2.创建一个发送邮件的类SmtpClient client = new SmtpClient("127.0.0.1");client.Credentials = new NetworkCredential("lisi@163.com", "lisi");client.Send(mail);Console.WriteLine("ok");
}

private static void SendMailWithImg()
{//1.创建一封邮件对象MailMessage mail = new MailMessage();mail.Subject = "我是邮件的主题";mail.SubjectEncoding = Encoding.UTF8;mail.Body = "我是邮件的正文";mail.BodyEncoding = Encoding.UTF8;//发件人mail.From = new MailAddress("lisi@163.com", "李四");//收件人mail.To.Add(new MailAddress("wangwu@163.com", "王五"));//-----------------------------------------------------------//设置邮件格式为html，将img标签设置到html中AlternateView htmlBody =AlternateView.CreateAlternateViewFromString("<img src='cid:aa' width='100px' height='100px'/>", null,"text/html");//创建一个链接资源，LinkedResource lr=new LinkedResource("h:/1.jpg","image/gif");//设置此链接资源MIME内容IDlr.ContentId = "aa";//将该链接资源添加到html中
    htmlBody.LinkedResources.Add(lr);//将html内容添加到邮件中
    mail.AlternateViews.Add(htmlBody);//-----------------------------------------------------------//2.创建一个发送邮件的类SmtpClient client = new SmtpClient("127.0.0.1");client.Credentials = new NetworkCredential("lisi@163.com", "lisi");client.Send(mail);Console.WriteLine("ok");
}

private static void SendMailWithAttachment()
{//1.创建一封邮件对象MailMessage mail = new MailMessage();mail.Subject = "我是邮件的主题";mail.SubjectEncoding = Encoding.UTF8;mail.Body = "我是邮件的正文";mail.BodyEncoding = Encoding.UTF8;//发件人mail.From = new MailAddress("lisi@163.com", "李四");//收件人mail.To.Add(new MailAddress("wangwu@163.com", "王五"));//-----------------------------------------------------------//添加附件Attachment a1=new Attachment(@"h:/1.jpg");Attachment a2=new Attachment(@"h:/1.rar");Attachment a3=new Attachment(@"h:/1.docx");mail.Attachments.Add(a1);mail.Attachments.Add(a2);mail.Attachments.Add(a3);//-----------------------------------------------------------//2.创建一个发送邮件的类SmtpClient client = new SmtpClient("127.0.0.1");client.Credentials = new NetworkCredential("lisi@163.com", "lisi");client.Send(mail);Console.WriteLine("ok");
}