Bounce processing Cannot create POP3 connection

Hi,
I was processing the bounces without problem… got the message ‘Please do not interrupt this process’ and for some stupid reason I closed the window!!! now when I try to process the bounces I get Cannot create POP3 connection to host.reece-safety.co.uk: Connection failed to host.reece-safety.co.uk,110: Connection timed out

Any idea how I can fix this.

Thanks
Tony