Java mail, mail, and mail attachment Implementation Program

Source: Internet
Author: User
Tags sendfile

This article describes how to use java mail to send mails, receive mails, and send mail attachments.

Send Email:

Java code

The Code is as follows: Copy code
Public class JavaMailTest {

Public static void main (String args []) throws MessagingException {
String smtpHost = "smtp.sohu.com ";
String from = "javamailfrom@sohu.com ";
String to = "javamailto@sohu.com ";

Properties properties = System. getProperties ();
Session session = Session. getInstance (properties );

MimeMessage message = new MimeMessage (session );
Message. setFrom (new InternetAddress (from ));
Message. addRecipient (Message. RecipientType. TO, new InternetAddress ());
Message. setSubject ("JavaMail Example ");
Message. setText ("Did it work? ");
Transport transport = session. getTransport ("smtp ");
Transport. connect (smtpHost ,"","");

Transport. sendMessage (message, message. getAllRecipients ());
Transport. close ();
}
}

The following error may occur:

'1970 5.1.1 <XXXX@ygsoft.com>: Recipient address rejected: User unknown in virtual mailbox table ',

The account you sent does not exist in the email system. Check whether your email address is entered incorrectly.

'554 5.7.1 <XXXX@ygsoft.com>: Sender address rejected: Access denied ',

Your email is an internal account, and the address you sent is not in the authorization domain

 

'1970 5.7.1 <XXXX@ygsoft.com>: Sender address rejected: not logged in ',

SMTP authentication is required for sending emails. The SMTP authentication part of your account is not set correctly. Please check the configuration

'1970 4.7.1 <unknown [***. ***]>: Client host rejected: Access denied'

Your IP address is blocked by the Administrator. Please check whether your machine is infected with viruses and send emails automatically
 

Receive email:

Java code

The Code is as follows: Copy code
Public class JavaMailReadMailTest {

Public static void main (String args []) throws MessagingException,
IOException {
String pop3Host = "pop3.sohu.com ";
String user = "******* @ sohu.com ";
String pass = "******";
Properties properties = System. getProperties ();
Session session = Session. getInstance (properties );
Store store = session. getStore ("pop3 ");
Store. connect (pop3Host, user, pass );

Folder folder = store. getFolder ("INBOX ");
Folder. open (Folder. READ_ONLY );
Message [] messages = folder. getMessages ();

For (int I = 0; I <messages. length; I ++ ){
System. out. println ("nFrom:" + messages [I]. getFrom () [0] + "n"
+ "Subject:" + messages [I]. getSubject ());
ContentType ct = new ContentType (messages [I]. getContentType ());
If ("text/html". equalsIgnoreCase (ct. getBaseType ())){
BufferedReader reader = new BufferedReader (
New InputStreamReader (messages [I]. getInputStream ()));
String s;
While (s = reader. readLine ())! = Null ){
System. out. println (s );
}
} Else {
Object o = messages [I]. getContent ();
If (o instanceof String ){
System. out. println (o );
} Else {
System. out. println (messages [I]. getContentType ());
If (o instanceof MimeMultipart ){
MimeMultipart mp = (MimeMultipart) o;
For (int j = 0; j <mp. getCount (); ++ j ){
MimeBodyPart bp = (MimeBodyPart) mp. getBodyPart (j );
System. out. println (bp. getContentType ());
}
}
}
}

}
}
}

Send attachments:

Java code

The Code is as follows: Copy code
Public class SendFile {
Public static void main (String args []) throws Exception {
String host = "smtp.sohu.com ";
String from = "*******";
String to = "*******";
String fileAttachment = "d: \ FileName ";

Properties properties = System. getProperties ();

Session session = Session. getInstance (properties, null );

MimeMessage message = new MimeMessage (session );
Message. setFrom (new InternetAddress (from ));
Message. addRecipient (Message. RecipientType. TO, new InternetAddress ());
Message. setSubject ("SendFile ");

MimeBodyPart messageBodyPart = new MimeBodyPart ();

MessageBodyPart. setText ("Hi ");

Multipart multipart = new MimeMultipart ();
Multipart. addBodyPart (messageBodyPart );

MessageBodyPart = new MimeBodyPart ();
DataSource source = new FileDataSource (fileAttachment );
MessageBodyPart. setDataHandler (new DataHandler (source ));
MessageBodyPart. setFileName (fileAttachment );
Multipart. addBodyPart (messageBodyPart );

Message. setContent (multipart );

Transport transport = session. getTransport ("smtp ");
Transport. connect (host ,"","");

Transport. sendMessage (message, message. getAllRecipients ());

Transport. close ();
}
}

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