Undelivered Mail Returned to Sender

This is the Postfix program at host gigabyte2.bom.sify.net.

I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the message returned below.

                        The Postfix program

<rajeevs_at_cybermedia.co.in>: host antispam3.sifymail.net[202.144.65.123] said:
    552-we don't accept email with the below content (#5.3.4) 552 Further
    Information: Virus mail (in reply to end of DATA command)

attached mail follows:

Your file is attached.

++++ Attachment: No Virus found
++++ Norman AntiVirus - www.norman.com

Sify Virus Warning Message

data.txt .pif is removed from here because it contains a virus.

---- Sify protects your PC by cleaning infected attachments ----

Sify Virus Warning Message

Found virus WORM_NETSKY.P in file data.txt .pif
The uncleanable file is deleted.

---- Sify protects your PC by cleaning infected attachments ----