As one of those who was affected, this is definitely a bit exaggerated. Here's what really happened (at least, on the system that I use; I can't speak for others).
The mail servers went down for a couple of hours last Friday morning - mail couldn't be sent or received. About an hour into the outage, the sysadmins sent a Windows Messaging service message to all terminals saying that the problem was a 52Mb file called "Amarillo Video" (or something like that) which people were e-mailing internally and please don't do it any more! That was it, essentially - a short-term nuisance, nothing more.
As for why this happened - well, our computer infrastructure is pretty old and cranky. The systems that fell over were mostly head office ones in London - there are literally hundreds of separate corporate networks currently in use, held together by duct tape (or so it sometimes seems), so only a fraction of the MOD was affected in the first place. They're all due to be replaced by a shiny new Defence Information Infrastructure (http://www.mod.uk/dcsa/organisations/dii/) which will be all singing, all dancing, capable of dealing with huge files etc etc etc. (Also all Windows, but you can't have everything.)
Slashdot Mirror
The mail servers went down for a couple of hours last Friday morning - mail couldn't be sent or received. About an hour into the outage, the sysadmins sent a Windows Messaging service message to all terminals saying that the problem was a 52Mb file called "Amarillo Video" (or something like that) which people were e-mailing internally and please don't do it any more! That was it, essentially - a short-term nuisance, nothing more.
As for why this happened - well, our computer infrastructure is pretty old and cranky. The systems that fell over were mostly head office ones in London - there are literally hundreds of separate corporate networks currently in use, held together by duct tape (or so it sometimes seems), so only a fraction of the MOD was affected in the first place. They're all due to be replaced by a shiny new Defence Information Infrastructure (http://www.mod.uk/dcsa/organisations/dii/) which will be all singing, all dancing, capable of dealing with huge files etc etc etc. (Also all Windows, but you can't have everything.)