[Mailman-Users] Problem: qmail says: Failed to exec mailmanwrapper: unable to determine caller's group name

Mark Sapiro msapiro at value.net
Mon Aug 28 19:47:51 CEST 2006

Heinrich, Maximilian wrote:
>Qmail says (after being not able to do anything useful with a mail sent
>to the mailing list) :
>> Failed to exec mailman wrapper: unable to determine caller's group
>name I'm not going to try again; 
>> this message has been in the queue too long.

I'm not sure exactly what's happening, but "Failed to exec mailman
wrapper: unable to determine caller's group name" seems to be an issue
with the group that Qmail is using to invoke the mail wrapper.

The wrapper doesn't issue that exact message (at least not in the
source distribution), but it can issue a message like

  Failure to find group name <group>.  Try adding this group
  to your system, or re-run configure, providing an
  existing group name with the command line option --with-mail-gid.


  Failure to find group name for GID <gid1>.  Mailman
  expected the mail wrapper to be executed as group
  "<group>", but the system's mail server executed the
  wrapper as GID <gid2> for which the name could not be
  found.  Try adding GID <gid2> to your system as "<group>",
  or tweak your mail server to run the wrapper as group

If this is the issue, the most likely cause is Qmail is invoking the
wrapper with a group ID that isn't registered on your system.

Mark Sapiro <msapiro at value.net>       The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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