I'm using Java Springboot to read the inbox of a Microsoft Exchange account (I am already able to send emails programmatically). When I try to read the inbox folder I receive a general error:
javax.mail.MessagingException: Connection dropped by server?
Username and password are of course correct.
I use the following configuration:
Properties mailProps = new Properties();
mailProps.setProperty("mail.transport.protocol","smtp");
mailProps.setProperty("mail.smtp.auth","true");
mailProps.setProperty("mail.smtp.starttls.enable","true");
mailProps.setProperty("mail.debug","false");
mailProps.setProperty("mail.smtp.sasl.mechanisms.oauth2.oauthToken", password);
Session session = Session.getDefaultInstance(mailProps);
Store store = session.getStore("imaps");
store.connect("outlook.office365.com", 143, username, password); //username and password are omitted
Folder emailFolder = store.getFolder("inbox");
emailFolder.open(Folder.READ_ONLY);
UPDATE: Since I can get the inbox from the Thunderbird client, I set up the code following the configuration on Thunderbird. Now I have:
DEBUG: getProvider() returning javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle]
DEBUG IMAPS: mail.imap.fetchsize: 16384
DEBUG IMAPS: mail.imap.ignorebodystructuresize: false
DEBUG IMAPS: mail.imap.statuscachetimeout: 1000
DEBUG IMAPS: mail.imap.appendbuffersize: -1
DEBUG IMAPS: mail.imap.minidletime: 10
DEBUG IMAPS: enable STARTTLS
DEBUG IMAPS: closeFoldersOnStoreFailure
DEBUG IMAPS: trying to connect to host "outlook.office365.com", port 143, isSSL true
javax.mail.MessagingException: Unsupported or unrecognized SSL message
at it.spring.platform.services.communication.mail.MailTest.read(MailTest.java:53)
For the sake of clarity and completeness I add the full Spring code I wrote to read the inbox:
import javax.mail.MessagingException;
import javax.mail.Store;
public class JavaMailReader
{
private Store store;
private String username;
private String password;
private String host;
private int port;
private String inbox;
public JavaMailReader(Store store, String host, int port, String username, String password, String inbox)
{
this.host=host;
this.port=port;
this.store=store;
this.username=username;
this.password=password;
this.inbox=inbox;
this.port = port;
}
public void connect() throws MessagingException
{
store.connect(host, port, username, password);
}
public Store getStore()
{
return store;
}
public String getInboxFolderName()
{
return this.inbox;
}
}
@Bean
public JavaMailReader emailReader(@Value("imaps") String protocol,
@Value("${mailreceiver.mail.host}") String host,
@Value("${mailreceiver.mail.port}") Integer port,
@Value("${mailreceiver.mail.password}") String password,
@Value("${mailreceiver.mail.username}") String username) throws NoSuchProviderException, MessagingException
{
Properties mailProps = new Properties();
mailProps.setProperty("mail.transport.protocol","imaps");
mailProps.setProperty("mail.imaps.auth","true");
mailProps.setProperty("mail.debug","true");
mailProps.setProperty("mail.imaps.sasl.mechanisms.oauth2.oauthToken", password);
Session session = Session.getDefaultInstance(mailProps);
Store store = session.getStore(protocol);
return new JavaMailReader (store, host, port, username, password, "inbox");
}
//testing
@Test
public void read() throws NoSuchProviderException, MessagingException
{
Message[] messages = mailService.getInbox(); //getInbox("Inbox")
Message found=null;
for(Message m: messages)
{
if(m.getSubject().equalsIgnoreCase(subject))
{
found=m;
break;
}
}
assertNotNull(found);
mailService.closeReader();
}
UPDATE 2: As suggested, I changed the port to 993 and removed starttls:
Properties mailProps = new Properties();
mailProps.setProperty("mail.transport.protocol","imaps");
mailProps.setProperty("mail.imaps.auth","true");
mailProps.setProperty("mail.debug","true");
maililProps.
setProperty("mail.imaps.sasl.mechanisms.oauth2.oauthToken", password);
Session session = Session.getDefaultInstance(mailProps);
Store store = session.getStore(protocol);
return new JavaMailReader (store, host, port, username, password, "inbox");
Now I have the error:
DEBUG IMAPS: trying to connect to host "outlook.office365.com", port 993, isSSL true
* OK The Microsoft Exchange IMAP4 service is ready. [ a string here omitted for security reason==]
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 AUTH=PLAIN AUTH=XOAUTH2 SASL-IR UIDPLUS ID UNSELECT CHILDREN IDLE NAMESPACE LITERAL+
A0 OK CAPABILITY completed.
DEBUG IMAPS: AUTH: PLAIN
DEBUG IMAPS: AUTH: XOAUTH2
DEBUG IMAPS: protocolConnect login, host=outlook.office365.com,
user= the user-email-here, password=<non-null>
DEBUG IMAPS: AUTHENTICATE PLAIN command trace suppressed
DEBUG IMAPS: AUTHENTICATE PLAIN command result: A1 NO AUTHENTICATE failed.
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 3.159 s
javax.mail.AuthenticationFailedException: AUTHENTICATE failed.
