On Sun, Sep 14, 2008 at 6:18 AM, Paul Hutchings <[EMAIL PROTECTED]> wrote: > We run Postfix in front of an Exchange 2003 box. I currently run a cron > job every hour to pull a list of valid email addresses of users (and all > associated aliases) and Public Folder email addresses down from the > Exchange box. > > Whilst we don't add/remove addresses terribly often, it's a guaranteed > way of making sure that any new accounts/email aliases are accepted > quickly if they're setup whilst I'm not here. > > I wondered how simple/difficult (I'm not new to Linux but would count > myself as a "know what I need to get by" type) it would be to have > Postfix do an "on the fly" ldap query and just have it cache the results > for a period of time rather than each and every hour have it download an > entire list of email addresses? > > I've had a look at the docs and Google and I'm struggling to find a "one > size fits all" guide. > > Thanks in advance. > > Paul
The way you're doing it is the right way. Don't change it. The load you're placing on Exchange with your current scheme is negligible, and the load you would have with the scheme you contemplate is likely to be non-negligible at some point, as, for instance, during a massive dictionary attack, or a joe job. Kurt
