Hi Chaps, Got a problem that I think is related to our AV software. Here's the setup: Exchange 2003 Windows 2003 Symantec Mail Security v 4.0 I'm getting an awful lot of "Unscannable" message errors, and its not obvious what is different about these emails. However they do have these entries in their headers: ---------------------------- ------_=_NextPart_001_01C3F239.E1391CA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ------_=_NextPart_001_01C3F239.E1391CA0 Content-Type: text/html; charset="iso-8859-1" ------_=_NextPart_001_01C3F239.E1391CA0-- ---------------------------------------------- There seems to be some encoding going on that SMS doesn't like, but how can I configure the AV to be able to scan these messages? One other thing: All messages with blank subjects are being blocked at Categorisation. I suspect SMS of this too. Can anyone shed any light on this? Many thanks in advance, Jason