Why am I getting this error see below) when sending an email to my client?

I do not spam nor have I ever emailed more than one person/client at a time yet I'm my emails are being rejected?

What network abuse are they talking about? Am I sharing a server with spamers? I thought, was mislead information, that BV does not host spamers because they can negatively affect others sharign the same server.

SMTP error from remote mail server after RCPT TO:<jmichels@ecentral.com>:
host inbound-1.ecentral.com []:
500 5.7.1 <voda31.voda31.com[]>:
Client host rejected: Access denied due to network abuse (SoftLayer/e-trinity Internetmarketing GmbH)

------ This is a copy of the message, including all the headers. ------
------ The body of the message is 572632 characters long; only the first
------ 106496 or so are included here.

Return-path: <billing@bigpawservices.com>
Received: from 97-122-241-130.hlrn.qwest.net ([]:63491 helo=Adir)
by voda31.voda31.com with esmtpa (Exim 4.69)
(envelope-from <billing@bigpawservices.com>)
id 1OHQSa-0001FU-P3