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javamail AuthenticationFailedException: EOF on socket


By : Bernfried Howe
Date : October 14 2020, 02:15 PM
it should still fix some issue I wrote a program to check mails with JavaMail. Here is the code: , You can solve this problem by converting pop3 to pop3s like this:
code :
properties.setProperty("mail.store.protocol", "pop3s");
properties.setProperty("mail.pop3s.host", popHost);
properties.setProperty("mail.pop3s.port", String.valueOf(openPort));
properties.setProperty("mail.pop3s.auth", "true");
properties.setProperty("mail.pop3s.socketFactory.class",
        "javax.net.ssl.SSLSocketFactory" ); 
properties.setProperty("mail.pop3s.ssl.trust", "*");

store = session.getStore( "pop3s" );


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JavaMail to send email through vps, require NO authentication, but get AuthenticationFailedException - why?


By : user2580427
Date : March 29 2020, 07:55 AM
this will help POP before SMTP authentication basically means you need to be able to prove that you can fetch your mail using POP3 (using proper authentication) before you will be allowed to send mail using SMTP (without authentication).
Using the Java Mail API, you can do the authentication to the POP3 server like this :
code :
Store store = ssn.getStore("pop3");
store.connect("mailhost", Username, Password);
t.connect();
email.setPopBeforeSMTP(true,popHost,popUsername,popPassword);

JavaMail SMTP Transport does not throw AuthenticationFailedException when given incorrect credentials


By : Yann Sévellec
Date : March 29 2020, 07:55 AM
wish help you to fix your issue After making the changes suggested by Bill Shannon it turned out the error was actually a logic error where getSmtpPassword() was returning the IMAP password (which led to successful login) under some circumstances, although the suggestions where not what solved the problem, the updated code is as follows:
code :
public boolean authenticateSMTP( SMTPConfiguration smtpConfiguration ) throws MessagingException {
    try {
        Properties properties = new Properties(  );
        properties.put( "mail.smtp.auth", true );
        properties.put( "mail.smtp.host", "smtp.gmail.com" );
        properties.put( "mail.smtp.port", 465 );
        properties.put( "mail.smtp.ssl.enable", true);

        Transport transport = Session.getInstance( properties ).getTransport();
        transport.connect( getSmtpUsername(), getSmtpPassword() );
        transport.close();
        return true;
    } catch ( AuthenticationFailedException e ) {
        return false;
    }
}

JavaMail - AuthenticationFailedException while reading outlook mail


By : user3643356
Date : March 29 2020, 07:55 AM
Any of those help Problem was wrong host ! replaced outlook.office365.com (imap-mail.outlook.com) to company specific host and it worked !
code :
mailStore.connect("mail.ad.company.com", "abc@company.com", "password"); 

JavaMail javax.mail.AuthenticationFailedException


By : ichabodwood
Date : March 29 2020, 07:55 AM
With these it helps You are mixing TLS and SSL configurations, and it's not correct. You need to choose the one to use. In particular, if you want to use SSL you should use something like this:

How to reuse Connection with JavaMail to avoid AuthenticationFailedException: Too many login attempts?


By : Joshua Reynoso
Date : September 30 2020, 12:00 PM
hop of those help? Presumably, transport.connect(EMAIL_FROM, PASSWORD) only needs to execute once, not every time you send an email. To that end, you should refactor to remove the creation of the properties, the obtaining of the session and transport, and the connection from transport away from the sendEmail method.
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