"Some people have actually been fired by e-mail, " says Charles Bermant, e-mail advice columnist for the Seattle Times.

CNN: Test your e-mail etiquette

Bob Neal, of Royal Mail, said the safety advice was not to send delivery staff out in the extreme weather.

BBC: Mail delay in south Warwickshire 'resolved within days'

Plus, Spence fired off an e-mail that summed up the advice he had given me and provided links to more information to help me increase my professional speaking platform.

FORBES: Meet Your Virtual Mentor

The site offers parents free advice via e-mail, guided tours of "safe sites" and recommended links and books on homeschooling.

CNN: Web puts the home back in homework

Royal Mail said customers needing more information and advice could contact its helpline number on 08457 740740.

BBC: NEWS | UK | Northern Ireland | Union offer to restart mail talks

Royal Mail and the Social Security Agency have issued advice to customers affected by the dispute.

BBC: NEWS | UK | Northern Ireland | Union offer to restart mail talks

The advice here came via e-mail or over the phone.

FORBES: What's the Plan?

Advice: Never use e-mail to convey sensitive information, especially anonymously.

CNN: Test your e-mail etiquette

Some may be as simple as giving patients greater e-mail and online support from their clinicians, which would enable timelier advice and reduce the need for emergency-room visits.

NEWYORKER: Big Med

Another unorthodox piece of advice from Crowther: Consider leaving off your street address and including only your e-mail address or cellphone number.

FORBES

Meanwhile, the journalist who took Casburn's call has said he gave evidence in the trial after taking advice from a union representative "only to confirm" that he had written an e-mail to superiors outlining the conversation.

BBC: April Casburn jailed for News of the World leak offer