Web users could find themselves inundated with spam emails as they return to work after the Christmas break, says Expert Messaging.

According to research by the communications company, on average Brits will have 450 messages in their inbox today, with 70 percent likely to be spam or unwanted mail.

Visit Broadband Advisor for the latest internet news, reviews, tips & tricks - and to take advantage of PC Advisor's unique, independent Broadband Speed Tester

This 'Spamalanche' is likely to result in many workers spending precious time cleaning out their inboxes. "Many people will be tempted to adopt the 'delete all' strategy when they return to the office, but it's a high-risk approach," said Bob Hallewell from Expert Messaging.

Instead, Hallewell urges web users to group emails into those to be dealt with immediately, delegated, deferred or deleted.

See also: Analysis: Is spam email dying?