Research from MessageLabs suggests that around one in 28 emails are currently infected by a virus or similar malware.
According to the managed email service provider, the number of malicious Web sites is on the rise.
During August, MessageLabs says that India was the most vulnerable region in terms of virus attacks with one in every 27.8 emails being infected.
The research also found that there was a rise in emails containing links to virtual postcards and YouTube video invites.
On August 15, there was a significant outburst of new malicious Web sites comprising 6,00,000 emails, which were distributed in just 24 hours.
As a result of this StormWorm activity, MessageLabs says that the number of emails which contained links to malicious code increased significantly in August to 19.5 per cent, a massive rise of 19 per cent from the July figure of 0.5 per cent.
Also during August, MessageLabs adds that the global ratio of spam in email traffic from new and unknown sources, for which the recipients' addresses were deemed valid, was 74 per cent, an increase of three per cent on the previous month.
During this time, Israel received the highest number of spam attack at the rate of 70.7 per cent, while France saw the most significant increase in spam levels at a 9.5 per cent, followed by Spain at 9.2 per cent.
Interesting stats - read more here...