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Subject: Alias "loop" problem, on migrating from sendmail
From: Clive Jones (clivedgw.co.uk)
Date: Fri Mar 17 2000 - 04:59:09 CST

I've finally found the time this week to move the mail system here
from sendmail to postfix, having already run postfix on my home
system for over a year.

Things went pretty smoothly, but I still have one difficulty -
some enties in the aliases file that worked perfectly under
sendmail, give problems under postfix.

I have a local user, flump. In /etc/aliases, I have lines:
  flump2: \flump
  flump3: some-other-user
  flump: flump2,flump3

I would expect the address flump to be alias-mapped to flump2 and
flump3, where flump2 is in turn is alias-mapped to the *local*user*
flump. This shouldn't be an aliasing loop, and indeed isn't one
for sendmail.

Under postfix, however, e-mail to flump bounces with:
  <flump2dgw.co.uk>: possible alias database loop for flump2

I can see a workaround - change the flump: line to:
  flump: \flump,flump3
...but for the number of cases like this which occur, this is
slightly cumbersome and error-prone. Is there a way to fix
postfix's behaviour?

Thanks,

--Clive.