C # email sending method summary

The "system. net. Mail" provided in. NET Framework 2.0 can be easily implemented. This article lists three methods for sending:
1. Use localhost;
2. Use normal SMTP;
3. SMTP over SSL;

For example:

1. Use localhost

 

Public void sendmaillocalhost ()
{
System. net. Mail. mailmessage MSG = new system. net. Mail. mailmessage ();
MSG. to. Add ("a@a.com ");
MSG. to. Add ("B @ B .com ");
/*
* Msg. to. Add ("B @ B .com ");
* Msg. to. Add ("B @ B .com ");
* Msg. to. Add ("B @ B .com"); can be sent to multiple people
*/
MSG. CC. Add ("c@c.com ");
/*
* Msg. CC. Add ("c@c.com ");
* Msg. CC. Add ("c@c.com"); can be copied to multiple people
*/
MSG. From = new mailaddress ("a@a.com", "alphawu", system. Text. encoding. utf8 );
/* The preceding three parameters are respectively the sender address (which can be written as needed), sender name, and encoding */
MSG. Subject = "this is a test email"; // mail title
MSG. subjectencoding = system. Text. encoding. utf8; // email title Encoding
MSG. Body = "Mail content"; // mail content
MSG. bodyencoding = system. Text. encoding. utf8; // email Content Encoding
MSG. isbodyhtml = false; // whether the email is an HTML email.
MSG. Priority = mailpriority. High; // mail priority

Smtpclient client = new smtpclient ();
Client. Host = "localhost ";
Object userstate = MSG;
Try
{
Client. sendasync (MSG, userstate );
// You can simply use client. Send (MSG );
MessageBox. Show ("sent successfully ");
}
Catch (system. net. Mail. smtpexception ex)
{
MessageBox. Show (ex. message, "email sending error ");
}
}

2. Use normal SMTP

 

Public void sendmailusezj ()
{
System. net. Mail. mailmessage MSG = new system. net. Mail. mailmessage ();
MSG. to. Add ("a@a.com ");
MSG. to. Add ("B @ B .com ");
/*
* Msg. to. Add ("B @ B .com ");
* Msg. to. Add ("B @ B .com ");
* Msg. to. Add ("B @ B .com"); can be sent to multiple people
*/
MSG. CC. Add ("c@c.com ");
/*
* Msg. CC. Add ("c@c.com ");
* Msg. CC. Add ("c@c.com"); can be copied to multiple people
*/
MSG. From = new mailaddress ("a@a.com", "alphawu", system. Text. encoding. utf8 );
/* The preceding three parameters are respectively the sender address (which can be written as needed), sender name, and encoding */
MSG. Subject = "this is a test email"; // mail title
MSG. subjectencoding = system. Text. encoding. utf8; // email title Encoding
MSG. Body = "Mail content"; // mail content
MSG. bodyencoding = system. Text. encoding. utf8; // email Content Encoding
MSG. isbodyhtml = false; // whether the email is an HTML email.
MSG. Priority = mailpriority. High; // mail priority

Smtpclient client = new smtpclient ();
Client. Credentials = new system. net. networkcredential ("username@zj.com", "userpass ");
// The email address and password registered at zj.com
Client. Host = "smtp.zj.com ";
Object userstate = MSG;
Try
{
Client. sendasync (MSG, userstate );
// You can simply use client. Send (MSG );
MessageBox. Show ("sent successfully ");
}
Catch (system. net. Mail. smtpexception ex)
{
MessageBox. Show (ex. message, "email sending error ");
}
}

 

The above method is not applicable to all SMTP, and zj.com can be used after testing, but smtp.163.com cannot.

3. SMTP over SSL

 

Public void sendmailusegmail ()
{
System. net. Mail. mailmessage MSG = new system. net. Mail. mailmessage ();
MSG. to. Add ("a@a.com ");
MSG. to. Add ("B @ B .com ");
/*
* Msg. to. Add ("B @ B .com ");
* Msg. to. Add ("B @ B .com ");
* Msg. to. Add ("B @ B .com"); can be sent to multiple people
*/
MSG. CC. Add ("c@c.com ");
/*
* Msg. CC. Add ("c@c.com ");
* Msg. CC. Add ("c@c.com"); can be copied to multiple people
*/
MSG. From = new mailaddress ("a@a.com", "alphawu", system. Text. encoding. utf8 );
/* The preceding three parameters are respectively the sender address (which can be written as needed), sender name, and encoding */
MSG. Subject = "this is a test email"; // mail title
MSG. subjectencoding = system. Text. encoding. utf8; // email title Encoding
MSG. Body = "Mail content"; // mail content
MSG. bodyencoding = system. Text. encoding. utf8; // email Content Encoding
MSG. isbodyhtml = false; // whether the email is an HTML email.
MSG. Priority = mailpriority. High; // mail priority

Smtpclient client = new smtpclient ();
Client. Credentials = new system. net. networkcredential ("username@gmail.com", "password ");
// Write your Gmail email address and password.
Client. Port = 587; // The port used by Gmail
Client. Host = "smtp.gmail.com ";
Client. enablessl = true; // encrypted by SSL
Object userstate = MSG;
Try
{
Client. sendasync (MSG, userstate );
// You can simply use client. Send (MSG );
MessageBox. Show ("sent successfully ");
}
Catch (system. net. Mail. smtpexception ex)
{
MessageBox. Show (ex. message, "email sending error ");
}
}

using Gmail to send emails has a very high success rate, and almost all emails can be sent. It is recommended.