Message contains NUL characters ...

Michael Sims michaels at
Mon Apr 25 08:42:27 EDT 2005

Marc G. Fournier wrote:
> Apr 24 15:29:02 hub postfix/lmtp[54800]: 0367A1298D0:
> to=<admin at>, relay=/var/run/socket/lmtp[/var/run/socket/lmtp],
> delay=273190, status=bounced (host
> /var/run/socket/lmtp[/var/run/socket/lmtp] said: 554 5.6.0 Message
> contains NUL characters (in reply to end of DATA command))


This is a FAQ (although it appears not to be in the actual FAQ or the
wiki...). Basically you want to configure your MTA so that NULs are stripped
before the messages containing them are passed to LMTP.  Check the archives
(watch for wrapping on this URL):

As for why this suddenly became a problem when it wasn't before, I have no
idea; maybe someone else can shed some light on that...


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