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Mail servers are major target for malicious email attacks, security experts have warned.

With businesses of all types becoming increasingly reliant on the internet and electronic communication, unsolicited email is a growing threat.

The security industry to protect against viruses, worms and phishing scams is booming as firms of all sizes look to protect their revenue streams.

‘Mail is a major channel for the distribution of malicious software,’ said Jeff Aliber, senior director of product marketing at security specialist Kaspersky Lab.

‘One targeted attack can reap significant losses to an organisation and the various elements of the ecosystem in which it operates.’

Kaspersky has just launched its new security package for the 2007 Microsoft Exchange Server.

It is likely to have no shortage of customers as businesses take a growing interest in electronic security.

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Trojans have topped threat lists during the first six months of the year, according to a new report.

Security firm BitDefender Labs says that Trojans were the most popular form of malicious threat in the first half of 2007, along with mass mailers.

The Netsky worm also continued to keep its place in the top ten threat list, with all of the malware in the table accounting for two-thirds of total web viruses.

Viorel Canja, head of BitDefender Labs, called the shift from viruses to Trojans ‘an interesting trend’.

‘Although the popularity of mass mailers is slowly receding, variants are still present and pose a very real risk to computer systems used by consumers and small businesses,’ he added.

A recent report from information security services provider SecureWorks revealed that the number of hackers targeting banking institutions has soared by 81 per cent since 2006, with attackers using the Gozi, Prg and BBB Trojans in particular.

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