MimeMessage.saveChanges is really slow
Fix the most common mistakes people make when using JavaMail in your code first. DNS lookup can hurt performance on some machines. For the JDK you can change the security properties for caching DNS lookup networkaddress.cache.ttl and networkaddress.cache.negative.ttl or set the system properties sun.net.inetaddr.ttl and sun.net.inetaddr.negative.ttl. The default behavior in JDK 7 and later does … Read more