Re: Temporary stopping external incoming emails

[mail...@securitylabs.it]

On 15/06/2011 11:19, Frank Bonnet wrote:
Hello
I would like to stop incoming/outgoing email to our site
without stopping internal emails exchange.

my configuration is quite classic


            INTERNET
                   |
                   |
           MX SERVER
                   |
                   |
       INTERNAL MAILHUB
                   |

If you want to stop MX server from sending emails to Internal mailhub I 
would block port 25 on mailhub with IPTABLES only from MX Server's IP. 
MX will queue emails and resent them to mailhub one you reopen the port 
in Mailhub.