Before Mail Server Setup
The cyrus-sasl package contains the Cyrus implementation of SASL. SASL is the Simple Authentication and Security Layer, a method for adding authentication support to connection-based protocols.
Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats.
The above definition have been collected from rpmfind.net you can also search for the definition out there.
How to make sure that your mail server is setup correctly and other ISP's on the internet can expect mails from your mail server, for example make sure that you have correct RDNS for your hostname.
1. Disable open-relay 2. Use http://www.mail-abuse.org/, http://www.orbs.org/, or Sorbes.net 3. Use Openspf.org for domains '''Make sure the the FQDN has the following'''. 1. A FQHN, Fully Qualified Host Name. 2. The FQHN has a DNS A record 3. The FQHN has a DNS MX record. $ORIGIN itmission.org. @ A 18.104.22.168 @ MX 10 mailhost.itmission.org. # For every mail host (real and virtual) in your DNS, make sure the zone files contain at least these records: $ORIGIN itmission.org. mailhost A 22.214.171.124 @ MX 10 mailhost.itmission.org. mailhost MX 10 mailhost.itmission.org. DNS settings can be checked using http://www.dnsreport.com/ Or you can reach http://emailstuff.org/