Collectives™ on Stack Overflow

Find centralized, trusted content and collaborate around the technologies you use most.

Teams

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

What could be causing SMTPSenderFailedException: 501 5.1.7 Invalid address using java mail?

Unfortunately, this is at a customer site, so we can't debug. Apparently it's been verified that both the to and from emails are valid. They are apparently using 'open authentication' because it is behind their firewall, so in that case our Properties and Session looks like this:

Properties props = new Properties();
props.put("mail.smtp.host", configuredHost);
props.put("mail.smtp.port", configuredPort);
props.put("mail.smtp.auth.login.disable", "true");
Session session = Session.getDefaultInstance(props, null);
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(fromEmail));
message.setRecipient(Message.RecipientType.TO, new InternetAddress(toEmail));
message.setSubject(subject);
message.setContent(messageBody, "text/html");
message.setSentDate(new Date());
This code is in use at other sites, and working. So what issue in their environment could be causing this?
                There is no authentication, as I said in the original post. It apparently resolved itself. I think it was user error with the addresses.
– user26270
                Mar 9, 2014 at 18:42
        
Thanks for contributing an answer to Stack Overflow!
Please be sure to answer the question. Provide details and share your research!
But avoid …
Asking for help, clarification, or responding to other answers.
Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.