<snip>> I want to configure SMTP relay server (RHEL), please guide me.> Sameer Surve</snip>
* First of all you need to list out your requirements. * Then you need to decided which MTA will be best for your purpose * You must also take in to account the steps necessary to be anti-spam compliant.. like use of SPF and DominaKeys * If you will use domain keys then check out which MTA is easier to configure for domainkeys. * Will you be relaying multi-domain? If not now, then in near future? -- config options depend on it. Especially domainkeys. There are 3 main MTAs 1. sendmail 2. postfix 3. qmail (netqmail edition) If mail mail traffic is expected to shoot, then you may want to choose between Postfix and Qmail. I have found Qmail to be easier when it comes to relaying for multi domains and even domainkey for each domain. [Non-text portions of this message have been removed]