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[Launchpad Bug Tracker <1862154@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package spamassassin - 3.4.2-0ubuntu0.18.04.4

---------------
spamassassin (3.4.2-0ubuntu0.18.04.4) bionic; urgency=medium

  * d/p/lp-1862154-*: avoid 'domain is utf8 flagged' flooding the logs
    (LP: #1862154)

 -- Christian Ehrhardt <christian.ehrhardt@xxxxxxxxxxxxx>  Mon, 10 Feb
2020 16:17:02 +0100

** Changed in: spamassassin (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1862154

Title:
  Syslog spammed with "domain is utf8 flagged"

Status in spamassassin package in Ubuntu:
  Fix Released
Status in spamassassin source package in Xenial:
  Fix Committed
Status in spamassassin source package in Bionic:
  Fix Released
Status in spamassassin source package in Eoan:
  Fix Released

Bug description:
  [Impact]

   * An issue fixed upstream in later releases can cause issues with UTF 
     emails

   * backport the upstream fix to stable supported releases to avoid log 
     flooding with related error messages.

  
  [Test Case]

   * using a test mail attached on this bug:
     $ apt install spamassassin
     $ systemctl start spamassassin
     $ wget https://bugs.launchpad.net/ubuntu/+source/spamassassin/+bug/1862154/+attachment/5326196/+files/bug1862154.eml
     $ spamc -R < bug1862154.eml
     $ grep "domain is utf8 flagged" /var/log/mail.log

  If still affected this will add some lines to the log, otherwise it
  won't.

  [Regression Potential]

   * The change is fortunately minimal (one line) and only changes the 
     output severity to not pop up in the logs.
     The one risk I can think of is people expecting this output, but I 
     can't think of a useful real case for this.

  [Other Info]
   
   * n/a

  
  ---

  Seems that https://bz.apache.org/SpamAssassin/show_bug.cgi?id=7632 has
  been re-introduced.

  # lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 18.04.3 LTS
  Release:	18.04
  Codename:	bionic

  # apt-cache policy spamassassin
  spamassassin:
    Installed: 3.4.2-0ubuntu0.18.04.3
    Candidate: 3.4.2-0ubuntu0.18.04.3

  I am seeing *lots* of info logs for every email:

  Feb  6 07:30:26 spam02a spamd[11370]: dns: new_dns_packet: domain is utf8 flagged: grace.ns.cloudflare.com
  Feb  6 07:30:26 spam02a spamd[11370]: dns: new_dns_packet: domain is utf8 flagged: sid.ns.cloudflare.com
  Feb  6 07:30:26 spam02a spamd[11370]: dns: new_dns_packet: domain is utf8 flagged: ns1.silverpop.com

  SpamAssassin/DnsResolver.pm - Line 549

  ---8<---
      if (utf8::is_utf8($domain)) {  # since Perl 5.8.1
        info("dns: new_dns_packet: domain is utf8 flagged: %s", $domain);
      }
  ---8<---

  This should be a dbg flag - this is fixed in Spamassassin 3.4.4
  upstream - could we have a backport for this current version of 3.4.2?

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