Got the below message back from Hotmail when emailing a friend I email every week. I have never experienced this particular error before, is this just an indication of high traffic between Google Mail and Hotmail? ---------- Forwarded message ---------- From: Mail Delivery Subsystem <mailer-daemon@googlemail.com> Date: 18 May 2010 23:06 Subject: Delivery Status Notification (Delay) To: me This is an automatically generated Delivery Status Notification THIS IS A WARNING MESSAGE ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. Delivery to the following recipient has been delayed: xxxxxxx@hotmail.co.uk Message will be retried for 2 more day(s) Technical details of temporary 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: 421 421 RP-001 The mail server IP connecting to Windows Live Hotmail server has exceeded the rate limit allowed. Reason for rate limitation is related to IP/domain reputation problems. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support (state 13). ----- Original message ----- Received: by 10.231.184.75 with SMTP id cj11mt3081679ibb.51.1274129866890; Mon, 17 May 2010 13:57:46 -0700 (PDT) MIME-Version: 1.0 Received: by 10.231.15.198 with HTTP; Mon, 17 May 2010 13:57:13 -0700 (PDT) From: me Date: Mon, 17 May 2010 21:57:13 +0100 Message-ID: <AANLkTilWHGkHdWtwgdaCFiAFA773Ma_tfefAFXfAeaBV@mail.gmail.com> Subject: xxxxxxxx Content-Type: text/plain; charset=ISO-8859-1 -- Regards, James. http://www.jamesbensley.co.cc/