> My take has been that SMTPD tries to do as little as possible in order
> to  conserve  sockets  and  shift processing load to less easily DoSed
> resources.  On  the other hand, one by-product is that net disk I/O is
> often      increased      when     certain     checks     that     are
> part-envelope/part-content into are shifted to the delivery processing
> phase,  and then are failed. But while some of these checks would be a
> cinch  to  perform  at  the  close of the envelope if there are only a
> couple  of  recipients,  you  have to consider scaleability: with many
> recipients  which  each  have  their own thresholds, the disk might be
> traversed  for  seconds, or even minutes, at the system's most exposed
> point.  I'd  venture  that  by  comparison,  always  so  shifting  the
> anti-spam blacklist in actions in IMail 8--which are all-envelope!--is
> more glaringly poor design.

OK, that makes sense. But how about a way to turn off the postmaster
messages to the sender that the mail box is full, like an advanced setting?
Yes, it is not something you would want all the time, but in the case of an
overloaded server and in the process of reconfiguring, being able to stop
sending out thousands of bounces would make a difference. 

> > Has  this  behavior changed in 8.0x? (The server will be upgraded to
> > 8.03 pending a resolution of a ODBC issue.)

Not an Imail issue, a client issue.

John Tolmachoff
Engineer/Consultant/Owner
eServices For You



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