Information and links about the ESVA anti-spam prebuilt VM. Its current home is now http://www.esvacommunity.com/ since the creator & original maintainer have become inactive.
A listing of the few remaining USB Flash/Thumb drives with write protection switches, with manufacturer links. These drives are useful when using computers of unknown safety/security.
We had a problem last weekend with Postfix not accepting email for a single domain when it was coming from outside our network, while messages from hosts on the local network were accepted and routed with no problems. Messages from outside the network were rejected with a 450 (temporary) code and the error message “Recipient […]