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3  Minimising external business email

People within an organisation can receive many emails from legitimate suppliers. For 

example, an IT manager might receive emails from hardware and software manufacturers, 

service providers, event or conference organisers and e-newsletters from magazines. It is 

usually left to the judgement of the individual employee to select appropriate e-newsletters. 

Spam filters will not usually block such messages, but primitive filters may. The challenge/

respond system will still enable such emails to be received. If certain websites are blocked, 

e-newsletters will be less effective since images are not downloaded from blocked sites. Many 

individuals use a separate email address from the main inbox when opting in. This means 

the e-newsletter can be read at the office or at home and is also available when the individual 

changes jobs.