Is it okay to have two dns servers (both are currently working) listed in the smtp settings? We currently list both dns that was provided to us by our T1 provider.
In the past, it was recommended to have multiple DNS servers.
However, the recommended practice now is to only have one. A good DNS server will "just work" -- it will always be reachable, and will work as expected. There are also some nasty problems that can occur with two DNS servers, if one of them isn't working properly. For example, if the second one isn't set up to allow recursion from the IMail server, then your mail will work fine -- until at some point all mail ends up eventually bouncing. Or, depending on how the two servers are used, if one doesn't allow recursion, you may see IMail going to the A record rather than the MX record (if it tries the MX record on the bad server, and then switches to the good server for the A record).
Our cpu usage is usually around 100% during the normal work hours and around 24%-50% during off hours, but everything seems normal? Is this normal, any thoughts? Thanks.
That's a lot of CPU usage. If you are processing over 100,000 E-mails/day, that level of CPU usage may be normal (depending on what kind of scanning you are doing for spam/viruses). If you go to the Task Manager, click on the "Processes" tab, and then click the "CPU" button, it will sort the processes by the percentage of CPU time they are using. This will show which processes are eating up the CPU time.
Also, make sure you are not running any of the old MONKEYS* spam tests -- they died last year, and made a very odd DNS change a couple days ago that caused one DNS server to use up 100% CPU time.
-Scott
---
Declude JunkMail: The advanced anti-spam solution for IMail mailservers since 2000.
Declude Virus: Catches known viruses and is the leader in mailserver vulnerability detection.
Find out what you've been missing: Ask for a free 30-day evaluation.
--- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)]
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/
