SMTP warnings and forwarded impossible email from spam quarantine

Dear Syymantec Support,

I have two problems with the Symantec Message Gateway. First of all, on the mxtoolbox.com the smtp test has two warnings since there is SMG:

Test                                  Result

SMTP Banner Check       Reverse DNS does not match SMTP Banner

SMTP TLS                       Warning - Does not support TLS.

On the other hands, if i want to forward an e-mail from spam quarantine, then i get this message: "Cannot release the message. It has either been released already or a deivery error occurred. Please Check Brigtmail Log for details."

The Brigtmail Log says: "Feb 20 2018 19:40:07 [http-bio-443-exec-9] [QuarantineManager] ERROR - error.quarantine.unable.release.delivery javax.mail.MessagingExpection: Could not connenct to SMTP host: .... "

I hope you can help solve this problem. Thanks in advance.