Traditionally, to test the configuration of Postfix you had to install a full featured DNS server. This was due to the MX records mechanism. When you send a mail outside, the MTA (Mail Transfer Agent) sends a request to the DNS server responsible (the…

The RHEL 6.8 has just been released and brings the following main benefits: it enhances security by replacing openswan with libreswan as VPN endpoint solution, it makes integration with Active Directory easier through SSSD improvements (cached authentication lookup, authentication via…