6.2.6 mail.smtp.sendpartial
When mail.smtp.sendpartial is set to true, and the message has an invalid address, then the mail is sent only to the valid address. In this case, SendFailedException is reported as partial failure for all the invalid addresses. If set to false, then the message is not sent to any of the addresses.
Description
If set to true and the message has both valid and invalid addresses, then the message is sent and a partial failure is reported with the SendFailedException exception. If set to false (the default value) and an invalid recipient address exists, then the message is not sent to any of the recipients.
Specifiable values
Type: Boolean
{true | false}
Example
Properties properties = new Properties();
properties.setProperty("mail.smtp.sendpartial", "true");
Session session = Session.getDefaultInstance(properties);
Message message = new MimeMessage(session);
message.setSubject(sentDate);
Transport.send(message);