On Jan 29, 2008 12:58 AM, Patrick W. Gilmore <[EMAIL PROTECTED]> wrote: > A general purpose host or firewall is NOTHING like a mail server. > There is no race condition in a mail server, because the server simply > waits until the DNS query is returned. No user is watching the mail > queue, if mail is delayed by 1/10 of a second, or even many seconds, > nothing happens. > > Now magine every web page you visit is suddenly paused by 100ms, or > 1000ms, or multiple seconds? Imagine that times 100s or 1000s of > users. Imagine what your call center would look like the day after > you implemented it. (Hint: Something like a smoking crater.) > > There might be ways around this (e.g. zone transfer / bulk load), but > it is still not a good idea. > > Of course I could be wrong. You shouldn't trust me on this, you > should try it in production. Let us know how it works out.
Andrew, IIUC, suggested that the default would be to allow while the check was performed. -Jim P.
