From 1st October 2013, a new download location will be added for spam rules downloads:
this is in addition to the current URIs:
http://pmw.sophos.com/ Applies to the following Sophos product(s) and version(s)
PureMessage for Microsoft Exchange
If you have firewall rules configured for spam rules downloads then they will need to be updated accordingly.
Related information / See also
PureMessage for Microsoft Exchange: troubleshooting spam rules download problems