Injected mail marked as spam when X-Originating-IP header is enabled

Injected mail marked as spam when X-Originating-IP header is enabled

Injected mail marked as spam when X-Originating-IP header is enabled

   KB 22699        Last updated on 05/31/2016  




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Problem

If the X-Originating-IP header is enabled, zimbra marks injected/local messages as spam.

X-Spam-Flag: YES
X-Spam-Score: 7.715
X-Spam-Level: *******
X-Spam-Status: Yes, score=7.715 tagged_above=-10 required=6.6
tests=[BAYES_00=-1.9, RCVD_IN_PBL=3.335, RCVD_IN_RP_RNBL=1.31,
RDNS_NONE=0.793, TVD_PH_BODY_ACCOUNTS_PRE=2.393, TVD_PH_REC=1.784]
autolearn=no autolearn_force=no

X-Originating-IP: [73.188.218.230] X-Mailer: Zimbra 8.6.0_GA_1153 (ZimbraWebClient - FF36 (Win)/8.6.0_GA_1153)

Resolution

To fix that, we can disable the X-Originating-IP header as follows:

Administrative Console -> Config -> Global Setting -> MTA -> Messages -> uncheck Add X-Originating-IP to messages.

Additional Content

The Spamhaus PBL is a DNSBL database of end-user IP address ranges which should not be delivering unauthenticated SMTP email to any Internet mail server, except those provided for specifically by an ISP for that customer's use. RCVD_IN_PBL lists IP addresses that are not expected to host a normal mail server, and the PBL has Self-Service removal and IP owner management mechanisms.

  • IP Address Self-Service Removal Mechanism

A feature of the PBL is the elimination of 'false positives' with a server-identifying and automatic removal mechanism for single IP addresses. This allows end users with static IP addresses within a larger dynamic pool, and legitimate mail server operators, to assert that in their opinion their IP addresses are a trustworthy source of email and to automatically remove (suppress) their IP addresses from the PBL database.

  • To check if your IP is listed in PBL click here
  • For more information on RCVD_IN_PBL click here


Bugs
zimbra bug: https://bugzilla.zimbra.com/show_bug.cgi?id=77949
spamassasin bug: https://bz.apache.org/SpamAssassin/show_bug.cgi?id=6501


Verified Against: Zimbra Collaboration 8.6, 8.5, 8.0 Date Created: THE DATE WHEN THE WIKI HAS BEEN CREATED dd/mm/yyyy
Article ID: https://wiki.zimbra.com/index.php?title=Injected_mail_marked_as_spam_when_X-Originating-IP_header_is_enabled Date Modified: 05/31/2016



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Wiki/KB reviewed by SME1 SME2 COPY EDITOR Last edit by Teodor Vizirov
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