asp.net C # uses mailmessage to send mail code

Example of MailMessage sending mail: C # helper class for sending mail The main thing is to use the Mail.mailmessage class under the Web namespace to send mail with this class is to set some properties on the instance of the MailMessage class, and then use SmtpMail to specify the SMTP server to send. The code is as follows:

The code is as follows

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<span id= "more-1794" ></span> Using System; Using System.Collections.Generic; Using System.Linq; Using System.Text; Using System.Net.Mail; Using System.Net.Mime; Using System.IO; Using System.Timers; Using System.Xml; Using System.Net; Namespace TEST. Subunit { public class Emailhelper { Public MailMessage mailmessage (string fromaddress,string desemailuser, String toaddress, String emailSubject, String Emailtext)//Mail sender, support for mass, multiple addresses separated by a half-width comma { MailMessage mm = new MailMessage (); Mm. To.add ("abc@qq.com"); Mm. To.add (toaddress)//temporary shielding Cc Mm. Cc. ADD (New MailAddress ("11@qq.com", "John", Encoding.GetEncoding (936)); Mm. Cc. ADD (New MailAddress ("22@qq.com", "Dick", Encoding.GetEncoding (936)); Mm. Cc. ADD (New MailAddress ("33@126.com", "Harry", Encoding.GetEncoding (936)); Mm. Bcc.add ("44@qq.com,44@qq.com"); Mm. from = new MailAddress (fromaddress, Desemailuser. Length&gt;0?desemailuser:fromaddress, Encoding.GetEncoding (936)); Mm. subjectencoding = encoding.getencoding (936);//Here is very important, if your mail title contains Chinese, here must be specified, otherwise the other side received very likely garbled. Mm. Subject = EmailSubject; Message headers Mm. Isbodyhtml = true; Whether the message body is HTML format Mm. bodyencoding = encoding.getencoding (936); The message body code, set incorrectly, the receiver will receive garbled //------------------------------------------------------------------------- Emailtext + = "This is the mailbox to be sent correctly:" + toaddress; Mm. BODY = emailtext;//Message text Mm. Priority = Mailpriority.high; Message priority, divided into low, normal, high, usually with normal Mm. Attachments.Add (New Attachment (@ "D:a.doc", SYSTEM.NET.MIME.MEDIATYPENAMES.APPLICATION.RTF)); The second parameter, which represents the file type of the attachment, can be used without specifying return mm; } public bool SendEmail (string fromemailaddress, String toemailaddress,string emailtitle,string emailcontent,string Host , String port,string fromemailuser,string desemailuser,string fromemailpass) { BOOL B=false; String message=string. Empty; MailMessage mailessage =this.mailmessage (fromemailaddress,desemailuser,toemailaddress,emailtitle,emailcontent); SmtpClient smtp = new SmtpClient (); Instantiate a SmtpClient Smtp. Deliverymethod = Smtpdeliverymethod.network; Set SMTP Outbound to Network Smtp. Enablessl = FALSE;//SMTP Whether SSL encryption is enabled on the server Smtp. host = host; Specify SMTP server address Smtp. Port = Int. Parse (port); Specifies the port of the SMTP server, which defaults to 25 Smtp. Credentials = new NetworkCredential (Fromemailuser, fromemailpass);//Certification Try { Smtp. Send (Mailessage); b = True; Message= "Send success!" } catch (System.Net.Mail.SmtpException ex) { b = False; Message= "Send failed!"; } return b; } } }

Example 2

The code is as follows

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Using systme.web.mail;//introduces namespaces protected void Button1_Click (object sender, EventArgs e) { MailMessage mmsg = new MailMessage ();//Instance One MailMessage Mmsg. Priority = mailpriority.low;//Set Priority level Mmsg. from = "weicfprince@163.com";//Sender Mmsg. to = "weicfprince@hotmail.com";//Recipient Mmsg. BodyFormat = mailformat.text;//Body Format Mmsg. Subject = "Mail Send Test"; Mmsg. BODY = "I sent a text message to myself in another mailbox"; Mmsg. Fields.Add ("Http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", 1); Sender Mailbox Information Mmsg. Fields.Add ("Http://schemas.microsoft.com/cdo/configuration/sendusername", "weicfprince"); Mmsg. Fields.Add ("Http://schemas.microsoft.com/cdo/configuration/sendpassword", "Hu Jintao");/password in this confidential haha Smtpmail.smtpserver = "smtp.163.com";//Specify SMTP server Try { Smtpmail.send (mmsg);//Send mail Response.Write ("1"); } catch (Exception ex) { Response.Write (ex. message); } }

Of course, you can also send attachments, using Mailattachments, which provides properties and methods to create a mail attachment object.
Mailattachments ma= New MailAttachment ("D://test.txt");/Send attachments to Mail
Mmsg. Attachments.Add (MA);//attach attachment to mail message object

The above is fully implemented to send mail function, but some mailboxes can not be sent, the reason is still not clear.