Com sun mail smtp smtpsendfailedexception 501 5.1 7 invalid address

A specific error message!

The error message you're seeing is:

SMTPSendFailedException: 501 5.1.7 Invalid address

Here's a breakdown of what it means:

• SMTPSendFailedException: This is a Java exception that indicates an error occurred while sending an email using SMTP (Simple Mail Transfer Protocol).
• 501: This is the SMTP error code, which indicates a syntax error in the email address.
• 5.1.7: This is a more specific error code, which indicates that the email address is invalid.
• Invalid address: This is a human-readable description of the error, indicating that the email address you're trying to send to is not valid.

In this case, the error is likely due to an invalid or non-existent email address in the To field of your email message. Here are some possible reasons:

1. Typo: Double-check the email address for any typos or incorrect characters.
2. Non-existent email address: The email address you're trying to send to may not exist or may be a disposable email address.
3. Domain not found: The domain part of the email address may not be valid or may not be configured to receive emails.

To resolve this issue, you can try the following:

1. Verify the email address: Make sure the email address is correct and exists.
2. Check the domain: Ensure the domain part of the email address is valid and configured to receive emails.
3. Use a valid email address: Replace the invalid email address with a valid one.

If you're using a Java-based email client or library, you can catch this exception and handle it accordingly. For example, you can log the error and retry sending the email with a valid address.