Very hard to troubleshoot without your Domain name. Sounds like you have
some DNS issues with your External DNS records. I would verify everything
is correct by going to www.dnsstuff.com and performing DNS Report on your
John Oliver, Jr
MCSE, MCT, CCNA
Exchange MVP 2010
Microsoft Certified Partner
"Michael" <Michael@discussions.microsoft.com> wrote in message
> From today, some clients could not send the emails to us. The error
> (NDR) shows below,
> Delivery to the following recipient failed permanently:
> Technical details of permanent failure:
> Google tried to deliver your message, but it was rejected by the recipient
> domain. We recommend contacting the other email provider for further
> information about the cause of this error. The error that the other server
> returned was: 550 550 Unrouteable address (state 14).
> But I check there is no error report at my server.
> Does anyone here help me to fix this issue?
> Thanks a lot.