On Fri, 17 Feb 2006, Jason Meers wrote:
> I have seen system filters that check for "first_delivery" to make sure that
> the message is only processed once even though system filters only run once
> for each message.
That is not correct. The system filter runs once per *delivery attempt*
per message. That is why is *is* correct to check first_delivery if you
want to do something like take a copy of a message.
A "delivery attempt" is when Exim looks at the message and tries to
deliver to all the as yet undelivered recipients. (Technically, it runs
a "delivery process" on the message.)
> Handling errors on messages that were intended to be "unseen" also seems to be
> causing some people grief.
In a filter, you can use "errors_to" to redirect the errors address. You
can also use "noerror" to ignore delivery errors.
> If any of you can share your opinions or configs on this with me I will
> summarise them back to the list for approval first, then write up a howto to
> PDF or post on the wiki once we have a broad consensus.
That is an excellent idea. Thank you.
--
Philip Hazel University of Cambridge Computing Service
Get the Exim 4 book: http://www.uit.co.uk/exim-book
