I'm trying to run a business on your email platform, and I'm finding several clients are getting error messages when they try to reply to the email I sent them from my Zoho account.

Here's a copy of the error message I've been forwarded by one of them:

Delivery has failed to these recipients or groups:

'Pedro Miguez' (pedro@rebelcreative.ca)
A problem occurred and this message couldn't be delivered. Check to be sure the e-mail address is correct. If the problem continues, please contact your helpdesk.

Diagnostic information for administrators:

Generating server: tor-exch10-et2.vistek.ca

pedro@rebelcreative.ca
#554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop ##

Original message headers:

Received: from TOR-EXCH10-CH2.vistek.ca (10.1.2.14) by

 tor-exch10-et2.vistek.ca (10.1.253.31) with Microsoft SMTP Server (TLS) id

 14.3.181.6; Thu, 18 Jun 2015 14:22:29 -0400

Received: from TOR-EXCH10-MB2.vistek.ca ([fe80::7d67:bbe3:af2d:7bd6]) by

 TOR-EXCH10-CH2.vistek.ca ([::1]) with mapi id 14.03.0224.002; Thu, 18 Jun

 2015 14:22:08 -0400

From: Richard Ruffolo <RRuffolo@vistek.ca>

To: 'Pedro Miguez' <pedro@rebelcreative.ca>

Subject: Vistek Quote - SQT899725

Thread-Topic: Vistek Quote - SQT899725

Thread-Index: AdCp869AIOICO+B2RjuYxL7eGGYwaQ==

Date: Thu, 18 Jun 2015 18:22:23 +0000

Message-ID: <BED56F44742455478BD00299C0977C97101FAFCB@TOR-EXCH10-MB2.vistek.ca>

Accept-Language: en-CA, en-US

Content-Language: en-US

X-MS-Has-Attach: yes

X-MS-TNEF-Correlator:

x-originating-ip: [10.1.2.72]

Content-Type: multipart/mixed;

        boundary="_004_BED56F44742455478BD00299C0977C97101FAFCBTOREXCH10MB2vis_"

MIME-Version: 1.0

Return-Path: RRuffolo@vistek.ca