I cant forward any email from my old hotmail.co.uk address (now appears as outlook.live.com)

I cant forward any email from my old hotmail.co.uk address (now appears as outlook.live.com)This is an enormous problem currently, I have tried multiple addresses, I can recive and send emails, just not forward!I get a postmaster reply saying Your message wasn't delivered because the recipient's email provider rejected it.If I try from my mobile its queued!