Inspired from other bloggers to tell an email feedburner subscriber who hasn't verified their subscription, I went to my feedburner.google.com account to check my blog Tukang Kritik subscribers. I was surprised because many email subscribers didn't verify their subscription, more than 10 subscribers.
Then, i emailed them one by one via my gmail email, but gmail reject my email because of the reason that the email address couldn't be identified by gmail, or non-real email address. Just little my unverified subscribers use real email address.
This is the simple rejection :

Delivery to the following recipient failed permanently:

xxxxxxx@yahoo.com

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: 554 554 delivery error: dd This user doesn't have a yahoo.com account (xxxxxxx@yahoo.com) [-5] - mta1050.mail.mud.yahoo.com

(state 18). ----- Original message -----

MIME-Version: 1.0
Received: by 10.142.118.31 with SMTP id i delete the code

1259894752360; Thu,
03 Dec 2009 18:45:52 -0800 (PST)
Date: Fri, 4 Dec 2009 09:45:52 +0700
Message-ID: <i delete the code@mail.gmail.com>
Subject: Konfirmasi Pelanggan Feedburner Blog Tukang Kritik
From: Asep Setiawan Junaedi <asep.septyari@gmail.com>
To: xxxxxxx@yahoo.com
Content-Type: multipart/alternative; boundary=i delete the code