https://bz.apache.org/SpamAssassin/show_bug.cgi?id=8391
Bug ID: 8391
Summary: RDNS_DYNAMIC rule
Product: Spamassassin
Version: 4.0.2
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Rules
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: Undefined
Hi!
Emails from the server mta-ru-r9-080.bitrix24.com are marked with the
RDNS_DYNAMIC rule.
The address does indeed look dynamic, but it's one of the bitrix24.com servers,
which has a cluster of MTA servers with configured SPF records.
-------headers---------
Received-SPF: pass (kzdm.bitrix24.ru: Sender is authorized to use
'[email protected]' in 'mfrom' identity (mechanism
'include:_sv6.bitrix24.com' matched)) receiver=mail.masangroup.ru;
identity=mailfrom; envelope-from="[email protected]";
helo=mta-ru-r9-080.bitrix24.com; client-ip=195.208.185.46
Received: from mta-ru-r9-080.bitrix24.com (mta-ru-r9-080.bitrix24.com
[195.208.185.46])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest
SHA256)
(No client certificate requested)
by mail.masangroup.ru (Proxmox) with ESMTPS id 49E0E616DD
for <[email protected]>; Mon, 20 Apr 2026 12:20:18 +0300
(MSK)
Received: from [10.10.10.209] (helo=cp9-dtln-multi-052)
by mta-ru-r9-080.bitrix24.com with esmtps (TLS1.3) tls
TLS_AES_256_GCM_SHA384
(Exim 4.99.1)
(envelope-from <[email protected]>)
id 1wEknW-0000000Fle1-1H5O
for [email protected];
Mon, 20 Apr 2026 12:20:07 +0300
Received: from [127.0.0.1] (helo=cp9-dtln-multi-052)
by cp9-dtln-multi-052 with smtp (Exim 4.98.2)
(envelope-from <[email protected]>)
id 1wEknV-00000003lR5-1vgv
for [email protected];
Mon, 20 Apr 2026 12:20:05 +0300
Received: (from [email protected])
by cp9-dtln-multi-052 (mini_sendmail/1.3.9 06Mar2023);
Mon, 20 Apr 2026 12:20:05 MSK
(sender nobody@cp9-dtln-multi-052)
-------headers---------
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