I subscribed to dng@lists.dyne.org recently and received an error message.  I was able to complete the registration on the web site but the error needs to be resolved or I will not be able to post anything.  An email sent to any address at lists.dyne.org results in the same error.

The error message:
Your message has been delayed and is still awaiting delivery
to the following recipient(s):

dng-owner@lists.dyne.org
(Was addressed to dng-owner@lists.dyne.org)
Message delayed
450 4.7.25 Client host rejected: cannot find your hostname, [65.49.128.26]

No recipients were successfully delivered to.

Reporting-MTA: dns; modus
Received-From-MTA: dns; [192.168.0.2] (unverified [174.238.156.145])
Arrival-Date: Tue, 22 Jan 2019 12:34:31 -0700

Final-Recipient: rfc822; dng-owner@lists.dyne.org
Action: delayed
Status: 2.1.0 (Success - addressing: no additional status information available)
Diagnostic-Code: smtp; 450 4.7.25 Client host rejected: cannot find your hostname, [65.49.128.26]

Received: from [192.168.0.2] (unverified [174.238.156.145]) by modus
(Vircom SMTPRS 6.3.119.21572/5271.7.4.) with ESMTP id <B0821464405@modus> for <dng-owner@lists.dyne.org>;
Tue, 22 Jan 2019 12:34:31 -0700
X-Modus-BlackList: 174.238.156.145=OK;fred@blakemfg.com=OK
X-Modus-RBL: 174.238.156.145=OK
X-Modus-Trusted: 174.238.156.145=NO
X-Modus-Spam-Version: 6.3.119.21572/5271.7.4.
X-Modus-Audit: FALSE;0;0;0
Message-ID: <5C4770A5.5010207@blakemfg.com>
Date: Tue, 22 Jan 2019 12:36:05 -0700
From: Fred <fred@blakemfg.com>
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.1.1
MIME-Version: 1.0
To: dng-owner@lists.dyne.org
Subject: possible mailing list problem
References: <B0821311430@modus>
In-Reply-To: <B0821311430@modus>
X-Forwarded-Message-Id: <B0821311430@modus>
Content-Type: multipart/mixed;
boundary="------------000001020709010903050907"
End of error message.

Would someone please forward this to dng-owner@lists.dyne.org and ask that I be advised how to resolve the issue?

Best regards,
Fred