Asp.net system. net. Mail

Example: CopyCode The Code is as follows: The 163.com mailbox is supported in the early application, but not in the later application.
21cn.com seems to have abandoned SMTP support. It may only be available to paying users.
The mailbox of QQ.com needs to be set in the user account.

I took a Sina.com email address for testing.

Can be sent. The Code is as follows:Copy codeThe Code is as follows: mailaddress from = new mailaddress ("sosuo8@sina.com ");
Mailaddress to = new mailaddress ("ahuinan@21cn.com ");
Mailmessage message = new mailmessage (from, );
Message. Subject = "A kinnan's letter ";
Message. Body = "Hello! Test ";
Smtpclient client = new smtpclient ();
Client. deliverymethod = smtpdeliverymethod. Network;
Client. Port = 25;
Client. Host = "smtp.sina.com ";
Client. Credentials = new system. net. networkcredential ("sosuo8@sina.com", "123 ");
Response. Write ("send an email to" + to. User + "," + to. Host + "," + client. HOST );
Client. Send (Message );

Don't forget to introduce the namespace:Copy codeThe Code is as follows: using system. net;
Using system. net. mail;