Mail Delivery Status Notification (Delay)

Mail Delivery Status Notification (Delay)

Hello. I received 2 of these messages today and another last week.
Is this issue being dealt with?


This message was created automatically by mail delivery system.

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

The original message was received at Wed, 04 Jan 2017 13:50:53 -0800
 from diane@i-designs.studio [diane@i-designs.studio]

    ----- The following addresses had fatal errors -----
   [Status: Error, Address: < tiffeny.uvp@outlook.com >, ResponseCode 421, RP-001 (SNT004-MC7F22) Unfortunately, some messages from 135.84.80.217 weren't sent. Please try again. We have limits for how many messages can be sent per hour and per day. You can also refer to  http://mail.live.com/mail/troubleshooting.aspx#errors .]

Message will be retried for 4 more day(s)

    ----- Transcript of session follows -----

 Received:from  mail-qt0-f174.google.com  ( mail-qt0-f174.google.com  [209.85.216.174]) by  mx.zohomail.com
        with SMTPS id 1483563937306434.106936174779; Wed, 4 Jan 2017 13:05:37 -0800 (PST)
 Message-ID:<CAA5JYn8fN= PMNEUt2DZ1Pm18XJHdhvqSzBxwvdRuKDz6XLCVFg@mail.gmail.com >
 Date:Wed, 4 Jan 2017 13:05:35 -0800
 From:Diane Meza <diane@i-designs.studio>
 To:Tiffeny-Una Voz Profetica < tiffeny.uvp@outlook.com >
 Subject:Re: Invoice
 Content-Type:multipart/mixed; boundary= 001a114023d471a07f05454b25df