Junk

Spam/Junk E-mail

I got a question today from John in Galway, He asked about spam e-mail in his Eircom Webmail account.

I have been using the same e-mail address for about a year, and never had a problem with spam or junk e-mail, but lately I have been getting swamped with it, I'm using Eircom web-mail as my e-mail service, Why did the spam only start now? And how can I stop it?
John K