Why is my message blocked by ABL (550-Policy MFRM56)?
Messages I attempt to send to my correspondent are blocked by ABL and I receive the following message from the system: This message was created automatically by mail delivery software.
Sorry, the message you're trying to send cannot be delivered to one or more recipients. The address may be invalid or mistyped. Please view the error below:
<dougjorg@ihug.com.au>: 550 - Policy-MFRM56: IP [103.250.212.14] is currently blocked by the ABL
Reporting-MTA: dns; mail-16-r90.ipv4.syd02.ds.network
Received-from-MTA: dns; cp-wc34.syd02.ds.network (122.201.124.175)
Arrival-Date: Wed, 25 Mar 2026 17:31:47 +0800
X-Original-ID: 71b3e4e9-282d-11f1-90a5-d094665788dc
Final-Recipient: rfc822; dougjorg@ihug.com.au Action: failed Status: 5.7.1 Remote-MTA: dns; mx-10.au-east.atmailcloud.com (52.65.162.33) Diagnostic-Code: smtp; 550 5.7.1 - Policy-MFRM56: IP [103.250.212.14] is
currently blocked by the ABL (in reply to MAIL command)
Received: from cp-wc34.syd02.ds.network (cp-wc34.syd02.ds.network [122.201.124.175])
by halon-out02.au.ds.network (Halon) with ESMTPS
id 71b3e4e9-282d-11f1-90a5-d094665788dc;
Wed, 25 Mar 2026 17:31:47 +0800 (AWST)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
d=theorchidmart.com; s=default; h=Subject:From:To:MIME-Version:Date:
Message-ID:Content-Type:Sender:Reply-To:Cc:Content-Transfer-Encoding:
Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender:
Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id:
List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive;
bh=HXRD6htWDxNSN7fZRKToybDQ9hr3EVuDMNtdFdD8QCA=; b=Mqd1c7I/wjIq742IOlHLkP6Xot
snq5FHg6/Qvwggzmct4A6Eku0Bt0+SJTBDy4QEnA5CZWTU1MvNZIDtnb9MEQNehF+fkqkmJPheEbU
ayVwXmZShQQ1zy2zXbXQpIHgZyC/HJ53BXYLMCDy0YYgotCUdWV4bvrf5ZoWSBIiRmY8+s43uFQU6
xF03xE0yzbDsU+tGkFgc7UPqgITi8t0bAVIiW5BgEPxGETNtvB7WAHkpKnnr5yDTRv4OVWf/Hw4Pl
Z0xV0IA6vcuzmRsle1GHVdh0vUsMWq8rgj6HBB2CRouOrfJYwbVSsBAi+c+Dd7LBzCt9ct5FQ1RR7
aq1p3fxg==;
Received: from [2001:8003:c012:bf00:65d7:80d2:4aca:d3fd] (port=50470)
by cp-wc34.syd02.ds.network with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
(Exim 4.96.2)
(envelope-from <roy@theorchidmart.com>)
id 1w5KaZ-004K05-03
for dougjorg@ihug.com.au;
Wed, 25 Mar 2026 20:31:47 +1100
Content-Type: multipart/alternative;
boundary="------------UgF3eNHWs59wnccDYNkQVDtA"
Message-ID: <736e9fe8-ccb9-43de-b3b1-94d794835dbf@theorchidmart.com> Date: Wed, 25 Mar 2026 20:31:46 +1100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: Doug Jorgensen <dougjorg@ihug.com.au> From: Roy McCulloch <roy@theorchidmart.com> Subject: TEST X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cp-wc34.syd02.ds.network X-AntiAbuse: Original Domain - ihug.com.au X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - theorchidmart.com X-Get-Message-Sender-Via: cp-wc34.syd02.ds.network: authenticated_id: roy@theorchidmart.com X-Authenticated-Sender: cp-wc34.syd02.ds.network: roy@theorchidmart.com X-Source: X-Source-Args: X-Source-Dir:
How can this be fixed?
All Replies (1)
Error code 550 5.7.1 indicates that your message has been rejected by the receiver's mail system. That can happen for a variety of reasons, including that your email service is on a block list, or is misconfigured. You can read a more technical description here:
https://email-knowledge.com/bouncecodes/5-7-1/
Unless you have direct control of your mail server settings, there is nothing your can do about it except to confirm your server settings and contact your email service tech support. It's not a Thunderbird thing.
You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.