C # mail sending

• Core knowledge points used to send emails

• Microsoft encapsulated mailmessage class: mainly processes the content of the sent mail (such as the recipient's address, title, subject, and image)
• Microsoft encapsulated smtpclient class: Mainly used to handle configuration information (such as the mail server, sending port number, and verification method) for sending this mail in SMTP mode)
• Smtpclient is encapsulated in three layers: socket --> tcpclient --> smtpclient

• The Code is as follows:

Public class myemail {private mailmessage mmailmessage; // mainly processes the content of the sent mail (such as the recipient's address, title, subject, and image) Private smtpclient msmtpclient; // mainly process the configuration information (such as the mail server, sending port number, and verification method) of sending this mail in SMTP mode. Private int msenderport; // The port number used to send the email (htmp protocol defaults to 25) Private string msenderserverhost; // the mail server address of the sender (either in IP or string format) Private string msenderpassword; // The password for sending the token private string msenderusername; // the user name for sending the token (that is, the string before the @ symbol, for example, [email protected]. The user name is: Hello) Private bool menablessl; // whether to perform socket-layer encrypted transmission of mail content private bool menablepwdauthentication; // Do You Want To verify the password of the sender's email address? // <summary> // constructor // </Summary> /// <Param name = "server"> email server address </param> /// <Param name = "tomail"> recipient address (which can be multiple recipients, programs are differentiated) </param> /// <Param name = "frommail"> sender address </param> /// <Param name = "subject"> email title </param> // /<Param name = "emailbody"> email content (can be designed in HTML format) </param> /// <Param Nam E = "username"> User name of the sender (that is, the string before the @ symbol, for example, [email protected], Username: Hello) </param> /// <Param name = "password"> sender's email password </param> /// <Param name = "Port"> the port number used to send the email (htmp the default protocol is 25) </param> /// <Param name = "sslenable"> "true" indicates encrypted transmission of mail content at the socket layer, false indicates that the email address is not encrypted </param> /// <Param name = "pwdcheckenable"> true indicates that the sender's email address is verified as a password, false indicates that password verification is not performed on the sender's email address </param> Public myemail (string server, string tomail, string frommail, string subject, St Ring emailbody, string username, string password, string port, bool sslenable, bool pwdcheckenable) {try {mmailmessage = new mailmessage (); mmailmessage. to. add (tomail); mmailmessage. from = new mailaddress (frommail); mmailmessage. subject = subject; mmailmessage. body = emailbody; mmailmessage. isbodyhtml = true; mmailmessage. bodyencoding = system. text. encoding. utf8; mmailmessage. priority = mailprio Rity. normal; this. msenderserverhost = server; this. msenderusername = username; this. msenderpassword = password; this. msenderport = convert. toint32 (port); this. menablessl = sslenable; this. menablepwdauthentication = pwdcheckenable;} catch (exception ex) {console. writeline (ex. tostring () ;}} public void send () {try {If (mmailmessage! = NULL) {msmtpclient = new smtpclient (); // msmtpclient. host = "SMTP. "+ mmailmessage. from. host; msmtpclient. host = This. msenderserverhost; msmtpclient. port = This. msenderport; msmtpclient. usedefacrecredentials = false; msmtpclient. enablessl = This. menablessl; If (this. menablepwdauthentication) {system. net. networkcredential NC = new system. net. networkcredential (this. msenderusername, this. msenderpassword); // msmtpclient. credentials = new system. net. networkcredential (this. msenderusername, this. msenderpassword); // NTLM: Secure Password Authentication in Microsoft Outlook Express msmtpclient. credentials = NC. getcredential (msmtpclient. host, msmtpclient. port, "NTLM");} else {msmtpclient. credentials = new system. net. networkcredential (this. msenderusername, this. msenderpassword);} msmtpclient. deliverymethod = system. net. mail. smtpdeliverymethod. network; msmtpclient. send (mmailmessage) ;}} catch (exception ex) {// m_createerrorlogtxt ("program pool (email) notification", "email failed", Ex. message );}}}

From: http://www.cnblogs.com/mingmingruyuedlut/archive/2011/10/14/2212255.html

/// <Summary> /// send email notification /// </Summary> /// <Param name = "subjectinfo"> title </param> /// <Param name = "bodyinfo"> content </param> Public static void email (string subjectinfo, string bodyinfo) {try {var appsettings = system. configuration. configurationmanager. deleetask; // get config configuration information string senderserverip = "mail.zbian.cn"; string tomailaddress = deleetask[ "tomailaddress"]; // recipient address string frommailaddress = deleetask[ "frommailaddress"]; // sender address string mailusername = receivetask[ "mailusername"]; // sender account string mailpassword = receivetask[ "mailpassword"]; // send the email password string mailport = "25"; myemail email = new myemail (senderserverip, tomailaddress, frommailaddress, subjectinfo, bodyinfo, mailusername, mailpassword, mailport, false, false ); email. send () ;}catch (exception ex ){}}

 

/// Add the config configuration information configuration Config = configurationmanager. openexeconfiguration (configurationuserlevel. none); config. appsettings. settings. add ("isfirstinstall", "true"); config. save (configurationsavemode. modified); configurationmanager. refreshsection ("receivettings"); // obtain the config configuration information var receivettings = system. configuration. configurationmanager. appsettings;