May I know if MailEnable make use of Java? As Java 8 End of Public Support and we need to verify if any cost need to pay for Oracle in future.

How can I configure the mailenable to accept hostname / invalid sender domain to send email? I have already added those sender IP address to the trust list without authenticate. However, once the sender address is in format like "ABC" instead of "ABC@domain.local", the mailenable SMTP service reject...