Your message dated Sat, 13 Nov 2021 18:57:33 -0500
with message-id <2133282.mereKNHi6x@localhost>
and subject line Really closing this time ..
has caused the Debian Bug report #991361,
regarding postfix should not use HELO localhost.localdomain
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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misconfiguration somewhere. Please contact ow...@bugs.debian.org
immediately.)


-- 
991361: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991361
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: postfix
Version: 3.4.14-0+deb10u1
Severity: grave
Justification: causes non-serious data loss

My server is blacklisted by Spamhaus, which says:

  Please correct your HELO localhost.localdomain [...]

at https://www.spamhaus.org/query/ip/2001:4b99:1:3:216:3eff:fe20:ac98

I don't know why it did that, and I don't know how to reproduce it
(I've just done a test, and it used joooj.vinc17.net as expected).
This might have been a temporary error under some condition, but
this is not acceptable.

Note: the FQDN of the machine is normally obtained via /etc/hosts,
which is

------------------------------------------------------------
127.0.0.1       localhost
::1             localhost ip6-localhost ip6-loopback
ff02::1         ip6-allnodes
ff02::2         ip6-allrouters

155.133.131.76  joooj.vinc17.net joooj
------------------------------------------------------------

I'm wondering: perhaps a temporary IPv4 failure leads to the issue,
and postfix has a hardcode localhost.localdomain in case of failure?

-- System Information:
Debian Release: 10.10
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-17-amd64 (SMP w/1 CPU core)
Locale: LANG=POSIX, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=POSIX 
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages postfix depends on:
ii  adduser                3.118
ii  cpio                   2.12+dfsg-9
ii  debconf [debconf-2.0]  1.5.71
ii  dpkg                   1.19.7
ii  e2fsprogs              1.44.5-1+deb10u3
ii  libc6                  2.28-10
ii  libdb5.3               5.3.28+dfsg1-0.5
ii  libicu63               63.1-6+deb10u1
ii  libsasl2-2             2.1.27+dfsg-1+deb10u1
ii  libssl1.1              1.1.1d-0+deb10u6
ii  lsb-base               10.2019051400
ii  netbase                5.6
ii  ssl-cert               1.0.39

Versions of packages postfix recommends:
ii  python3  3.7.3-1

Versions of packages postfix suggests:
ii  bsd-mailx [mail-reader]  8.1.2-0.20180807cvs-1
ii  emacs-nox [mail-reader]  1:26.1+1-3.2+deb10u2
ii  libsasl2-modules         2.1.27+dfsg-1+deb10u1
ii  mailutils [mail-reader]  1:3.5-4
ii  mutt [mail-reader]       1.10.1-2.1+deb10u5
pn  postfix-cdb              <none>
ii  postfix-doc              3.4.14-0+deb10u1
pn  postfix-ldap             <none>
pn  postfix-lmdb             <none>
pn  postfix-mysql            <none>
ii  postfix-pcre             3.4.14-0+deb10u1
pn  postfix-pgsql            <none>
ii  postfix-sqlite           3.4.14-0+deb10u1
ii  procmail                 3.22-26
pn  resolvconf               <none>
ii  sasl2-bin                2.1.27+dfsg-1+deb10u1
pn  ufw                      <none>

-- debconf information:
  postfix/tlsmgr_upgrade_warning:
  postfix/sqlite_warning:
  postfix/relayhost:
* postfix/destinations: joooj.vinc17.net, vinc17.net, joooj, 
localhost.localdomain, localhost
  postfix/lmtp_retired_warning: true
* postfix/procmail: true
  postfix/relay_restrictions_warning:
* postfix/mailbox_limit: 1073741824
* postfix/root_address:
* postfix/chattr: true
* postfix/mynetworks: 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
  postfix/mydomain_warning:
* postfix/mailname: vinc17.net
  postfix/compat_conversion_warning: true
  postfix/not_configured:
* postfix/recipient_delim: -
* postfix/protocols: all
  postfix/kernel_version_warning:
  postfix/newaliases: false
  postfix/bad_recipient_delimiter:
  postfix/dynamicmaps_conversion_warning:
  postfix/rfc1035_violation: false
* postfix/main_mailer_type: Internet Site
  postfix/retry_upgrade_warning:
  postfix/main_cf_conversion_warning: true

-- 
Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

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