The results may be positive for British businesses using email marketing, as their target audience is potentially less likely to receive spam from the UK. This in turn, leaves marketing channels clearer, allowing businesses' messages to get through to consumers more easily.
The worst offender was India, which was said to be responsible for 9.3 per cent of spam messages. The US - typically top of the table - dropped to second, accounting for 8.3 per cent. South Korea was third with 5.7 per cent, whilst Indonesia and Russia came in joint fourth - each accounting for 5 per cent.
Overall, the number of spam messages sent also saw a decline, with forecasters putting the trend down to cybercriminals increasingly turning to social media channels instead of email.
Speaking to itproportal.com about the results, Sophos' Graham Cluley explained: "Spammers are increasingly finding traditional email spam ineffective, turning to social networks to spread these kinds of marketing spam campaigns instead.
"Facebook and Twitter have for some time been targeted with campaigns but, most recently, hot new social network Pinterest has been used by spammers to distribute posts linking to web pages offering to sell goods or earning commission for the spammers."