Queues not emailing

Hi guys,

On a well established RT 3.4.5 install on Solaris 9, I am seeing a
problem with some queues not sending the mail back to the requester
and/or Admin CC’s, but others are. This isn’t just new queues, but some
long established and previously working queues.

Nothing obvious in the RT.log, although I do have the following, which I
think may be unrelated:

root# tail rt.log
(/opt/rt3/lib/RT/I18N.pm:226)
[Fri Dec 15 10:59:32 2006] [info]: Successful login for root from
xxx.xxx.xxx.xxx (/opt/rt3/share/html/autohandler:197)
[Fri Dec 15 11:09:39 2006] [debug]: Guessed encoding: ascii
(/opt/rt3/lib/RT/I18N.pm:396)
[Fri Dec 15 11:09:39 2006] [debug]: Guessed encoding: ascii
(/opt/rt3/lib/RT/I18N.pm:396)
[Fri Dec 15 11:09:39 2006] [debug]: Converting ‘ascii’ to ‘utf-8’ for
text/plain - Pricing Configuration
(/opt/rt3/lib/RT/I18N.pm:226)
[Fri Dec 15 11:11:28 2006] [debug]: Guessed encoding: ascii
(/opt/rt3/lib/RT/I18N.pm:396)
[Fri Dec 15 11:11:28 2006] [debug]: Guessed encoding: ascii
(/opt/rt3/lib/RT/I18N.pm:396)
[Fri Dec 15 11:11:28 2006] [debug]: Converting ‘ascii’ to ‘utf-8’ for
text/plain - Pricing Configuration
(/opt/rt3/lib/RT/I18N.pm:226)

The sendmail aliases file is correct and validates, I can test using the
general queue and some others that I know work, but cannot find a cause
for the broken ones.

Anyone any ideas on tracking this down.

Thanks

Richard