> This  seems a great thing. It should also allow me to run gatewaying
> services  to  a  restricted number of recipients, or in other words:
> offer relaying packages for 10, 20, 30, ... users.

Well, sure, that's the idea. A lot more than 30, of course.

> How much users are realistic vor 5xxSink?

This depends on:

- disk speed

- disk/RAID cache

- CPU speed

- number of simultaneous connections

-  placement of addresses within the list; if users/domains at the top
of  the list receive more mail, the average lookup time will be lower,
and vice versa

- ratio of bad rcpt attempts to good rcpts; a bad rcpt requires a full
file  scan  before failing, while a good rcpt "short-circuits" after n
lines/cycles

A  single  connection  can  do a full scan on a 100,000 user list (bad
rcpt) in less than a second. Real-world results as you add connections
will be more complex. I might think about adding code that would write
an  event  to  the  event  log  if  lookups  start  taking more than a
predefined threshold such as 2 seconds.

--Sandy


------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
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