Change email address for account and installation

I am trying to change my email address registered for my account and installation, however I keep getting a Junkmail rejected error. I sent the email from my registered purchase address.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.

The following address failed:
        SMTP error from remote server for RCPT TO command, host: ( reason: 550-"JunkMail rejected - []:34407 is in a n
550 RBL: Listed by SBL, see

I have already changed the email in the forum to my new address.

Is it possible to change my registered address to my forum email and send me a confirmation.
Otherwise how to contact support?

Please advise what to do.

Many thanks and kind regards

Write private message on the forum with your new address or write to support saying old address and new address.