//MailMessageの作成 System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage( "from@xxx.xxx", "to@xxx.xxx", "題名", "本文"); System.Net.Mail.SmtpClient sc = new System.Net.Mail.SmtpClient(); //SMTPサーバーなどを設定する sc.Host = "localhost"; sc.Port = 25; sc.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network; //ユーザー名とパスワードを設定する sc.Credentials = new System.Net.NetworkCredential("user", "pass"); //
![SMTP認証でメールを送信する](https://cdn-ak-scissors.b.st-hatena.com/image/square/023aba6794a242b39acf357acd0547ff2970d935/height=288;version=1;width=512/https%3A%2F%2Fdobon.net%2Fs%2Fimg%2Fog%2Fm%2Fvb%2Fdotnet%2Finternet%2Fsmtpauth.jpg)