[Bug 8395] New: RDNS_NONE rule triggered on addresses that have RDNS

https://bz.apache.org/SpamAssassin/show_bug.cgi?id=3D8395

            Bug ID: 8395
           Summary: RDNS_NONE rule triggered on addresses that have RDNS
           Product: Spamassassin
           Version: 4.0.2
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: spamassassin
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: Undefined

Hi.
Sometimes the "RDNS_NONE" rule is triggered on addresses that have RDNS.

Example:
---- email headers -----
Delivered-To: [email protected]
Return-Path: [email protected]
Received-SPF: pass (tpp.ru: 77.220.60.126 is authorized to use 'andreev@tpp=
.ru'
in 'mfrom' identity (mechanism 'a:mail2.tpp.ru' matched))
receiver=3Dmail.masangroup.ru; identity=3Dmailfrom; envelope-from=3D"andree=
[email protected]";
helo=3Dmail.tpp.ru; client-ip=3D77.220.60.126
Received: from mail.tpp.ru (unknown [77.220.60.126])=20
(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))=20
(No client certificate requested)=20
by mail.masangroup.ru (Proxmox) with ESMTPS id 50DA3608FD=20
for <[email protected]>; Fri, 22 May 2026 06:25:15 +0300 (MSK)
Received: from SRV-MSC-MDB1.corp.tpp.ru (10.168.11.141) by=20
SRV-VDK-MDB1.corp.tpp.ru (10.120.1.141) with Microsoft SMTP Server=20
(version=3DTLS1_2, cipher=3DTLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id=20
15.2.1544.4; Fri, 22 May 2026 13:25:05 +1000
Received: from SRV-MSC-MDB1.corp.tpp.ru (10.168.11.141) by=20
SRV-MSC-MDB1.corp.tpp.ru (10.168.11.141) with Microsoft SMTP Server=20
(version=3DTLS1_2, cipher=3DTLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id=20
15.2.1544.4; Fri, 22 May 2026 06:25:06 +0300
Received: from SRV-MSC-MDB1.corp.tpp.ru ([::1]) by SRV-MSC-MDB1.corp.tpp.ru=
=20
([::1]) with mapi id 02.15.1544.004; Fri, 22 May 2026 06:25:06 +0300
From: =3D?utf-8?B?0JDQu9C10LrRgdCw0L3QtNGAINCQ0L3QtNGA0LXQtdCy?=3D=20
<[email protected]>
To: =3D?utf-8?B?0JDQu9C10LrRgdCw0L3QtNGAINCQ0L3QtNGA0LXQtdCy?=3D <andreev@t=
pp.ru>
subject: SPAM:
=3D?UTF-8?Q?=3DD0=3DB8=3DD0=3DBC=3DD0=3DBF=3DD0=3DBE=3DD1=3D80=3DD1=3D82=3D=
D0=3DBD=3DD0=3DB0=3DD1=3D8F=3D20?=3D
=3D?UTF-8?Q?=3DD0=3DBB=3DD0=3DBE=3DD0=3DB3=3DD0=3DB8=3DD1=3D81=3DD1=3D82=3D=
D0=3DB8=3DD0=3DBA=3DD0=3DB0=3D20?=3D
=3D?UTF-8?Q?=3DD0=3DB8=3D20?=3D
=3D?UTF-8?Q?=3DD1=3D82=3DD0=3DB0=3DD0=3DBC=3DD0=3DBE=3DD0=3DB6=3DD0=3DB5=3D=
D0=3DBD=3DD0=3DBD=3DD0=3DBE=3DD0=3DB5=3D20?=3D
=3D?UTF-8?Q?=3DD0=3DBE=3DD1=3D84=3DD0=3DBE=3DD1=3D80=3DD0=3DBC=3DD0=3DBB=3D=
D0=3DB5=3DD0=3DBD=3DD0=3DB8=3DD0=3DB5?=3D
Thread-Topic:
=3D?utf-8?B?0LjQvNC/0L7RgNGC0L3QsNGPINC70L7Qs9C40YHRgtC40LrQsCDQuCDRgtCw?=
=3D=20
=3D?utf-8?B?0LzQvtC20LXQvdC90L7QtSDQvtGE0L7RgNC80LvQtdC90LjQtQ=3D=3D?=3D
Thread-Index: AdzpmocWmR4Pv7yYTwWcxcK5YwhZ+Q=3D=3D
Date: Fri, 22 May 2026 03:25:05 +0000
Message-ID: <[email protected]>
Accept-Language: ru-RU, en-US
Content-Language: ru-RU
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
x-originating-ip: [10.120.1.82]
Content-Type: multipart/related;=20
boundary=3D"_004_393082e0cca042a2946564da05141972tppru_";=20
type=3D"multipart/alternative"
MIME-Version: 1.0
---- email headers -----


# dig +short -x 77.220.60.126
mail2.paruslog.cn.
mail2.tpp.ru.
mail.paruslog.cn.
mail.tpp.ru.       <=3D=3D=3D helo=3Dmail.tpp.ru;
mail2.paruslog.kr.
mail.paruslog.kr.

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