The mailing list for listmasters using Sympa

[Mateusz Krawczyk <address@concealed>]

Hello,

We are running Sympa 6.1.7. One of our lists is moderated. Sometimes we 
get this kind of empty mail (below I think the most important parts):


Mime-Version: 1.0 (Apple Message framework v753.1)
To: address@concealed
Message-Id: <address@concealed>
Content-Type: multipart/mixed; 
boundary="----=_NextPart_000_000B_01CA92EA.9B1222A0"
From: Jxxxx Gxxxx <address@concealed>
Subject: zapraszamy :-)
Date: Mon, 10 Sep 2012 13:42:18 +0200
X-Mailer: Apple Mail (2.753.1)


------=_NextPart_000_000B_01CA92EA.9B1222A0--

--__ <address@concealed>--


After distributing such mail to subscribers sympa.pl demon dies and mail 
with distributing command get stuck in sympa's spool dir.

Logs:

Warning: Unrecognized variable: "tag"

Can't call method "head" on an undefined value at 
/opt/local/sympa/bin/List.pm
line 4525.

I will be very grateful for any ideas what can I do with that problem ?


Mateusz Krawczyk