We are a medium sized company with 5,000 employees. Every day we send and receive about 10,000 e-mails.
We want to set up our own Linux mail server (Postfix+Cyrus). What is recommended hardware for such needs?
I'd recommend looking for VPS's, take a look at Logicworks they have infiniCloud services, with CentOS , Postfix+Cyrus... all you may need for your services.