Hi, I am presently using qmail-ldap as my corporate email server and was using it around 2 years with out any problems. Recently I have exponentially increased my user base and the count has exceeded 2000. Apart from this my operation really demands the heavy usage of the email server that I get huge Volume of emails each day. At peak times I touch around 5k mails which is the 5-10 minutes average. I am expecting the user base to go high this year. I am running IBM x346 Intel Dual Processor with 4 GB RAM today. I do run SPAMASSASSIN and CLAMAV on the same server which is eating up my PROC like anything. Ideally I want to scan even outgoing emails send by my internal users. When I enable qmail-scanner for all the traffic, my processor load is almost touching 60-70 at peak time.
I have 2 Ideas at present. I just want to get some support in here for which one to go with. 1. Is it possible to have all the SMTP and SPAM + CLAM put on a separate server? (Front end Back end model). I have been doing some testing and have found out that RBL checks and Recipient checks does only work if you have your domain name included in your ~/control/locals :-( which will again put that load on the back end server. 2. Using Red Hat Cluster Suite to have 2 email servers which will balance the load with a common IP and GFS implemented so that they both share the same storage (FC SAN) Is there any other better option? Please advice on the same. Regards, Manoj
