Not to jump ahead of Eric, but... By default, QM stores 200 entries in the cache. You can configure it to store from 5 to 5000 entries. When the max size is reached, we delete the oldest entry in the cache (first in, first out).
It uses the TTL from the record. So, the record gets stored in memory until the cache is full (and it's the oldest in the cache), or the TTL expires. You can flush it by clicking 'Clear Cache' in iadmin, or by restarting QM. You can disable use of the cache in iadmin. QM has its own DNS resolver, it doesn't use the local cache. Unless you meant the local DNS server's cache. For that, we're just saving the lookup (and a potential wait should a timeout occur). Not all admins use a local DNS server. Some don't have one. Have a good one, Christian -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Len Conrad Sent: Thursday, May 19, 2005 12:45 PM To: [email protected] Subject: Re: [IMail Forum] 554 errors >Yup has had one since 8.1 in the Queue Manager how big is it? does it have max size? What happens when the max cache size is reached? does it use the TTL of the DNS records, or make up its own TTL? is there a way to flush it? is there a way to disable it? :) What's the advantage of Imail running its own DNS cache when the local DNS's cache, mostly a sub-5 ms round-trip-time, has one already? Len _____________________________________________________________________ http://IMGate.MEIway.com : free anti-spam gateway, runs on 1000's of sites To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
