[Avcheck] avcache announcement

Ralf Hildebrandt Ralf.Hildebrandt@charite.de
Thu, 14 Mar 2002 16:15:48 +0100


On Thu, Mar 14, 2002 at 06:00:58PM +0300, Michael Tokarev wrote:

> Ralf, this may be a better idea/solution for your exact problem.  How
> about using Message-ID field instead of checksum as a key?

The message-id can be forged -- specified by the sender. 
I don't know how qmail generates (if at all!) message-id's for mail
that was intended to be multi-recipient mail.

It should be a checksum of the mailbody. Fefe's opinion was that there
could be collisions (which is true), but given the fact that the cache
is very short lived (10 minutes), this should not be a problem.

> For others: the problem is that on Ralf's environment, qmail is used
> for initial mail submission, and many messages are destined for multiple
> recipients.  As a result, postfix receives many copies of the same msg
> (qmail sends one-rcpt-at-a-time) and checks many msgs as well instead
> of only one.

Correct.

-- 
Ralf Hildebrandt (Im Auftrag des Referat V A)   Ralf.Hildebrandt@charite.de
Charite Campus Virchow-Klinikum                 Tel.  +49 (0)30-450 570-155
Referat V A - Kommunikationsnetze -             Fax.  +49 (0)30-450 570-916
Why you can't find your system administrators:
Because the trauma induced by repeated attempts to install Solaris 2.5 pre-beta on an Intel system has forced him to seek psychotherapy.