Thank You very much for the answer. Prompt and apt as always!!!! On Thu, Apr 5, 2012 at 8:59 PM, Wietse Venema <wie...@porcupine.org> wrote:
> DN Singh: > > Hello group, > > While implementing our own DNSBL, I came across a phenomenon. Right now > in > > testing phase, I found that the dns queries were being cached in postfix > > itself. I had made some changes in the dns side, and wanted them to be > > reflected on the mta. > > A Postfix SMTP daemon caches successful DNS[BW]L lookup results > TEMPORARILY in its own memory. It terminates after being idle for > $max_idle seconds (default 100), after serving $max_use clients > (default: 100), or after "postfix reload". > > The postscreen daemon does not cache DNS lookup results. Instead, > it saves its whitelisting decisions to a persistent database. > > Wietse >
