So I started out trying to mail the support address, got this: I need some info for a shipment.. hopefully sending this here gets the attention of someone from Uber Ent..
Are you able to create a new Support Ticket from our website here? http://support.uberent.com/ If you're unable to create a new ticket from the site, please feel free to PM for this issue. BTW, I checked the link provided in the error message. Do you have an email forwarding service linked to your email account? It looks like your account is being auto-blocked by Gmail to prevent spam. It may help to add support@uberent.com as a trusted contact. I'm not sure why it's being blocked.