Q: I have configured the mailbox server correctly, but why does it still prompt "warning: SMTP server configuration is not legal"?
A: If you are using a JDK version of 1.8 and above (the JDK version comes with the iPortal product package is 1.8), the mail server configuration may not be verified when the security protocol uses SSL or STARTTLS, prompting "Warning: SMTP server Configuration is not legal ". You need to resolve by the following steps: