Representatives from 37 e-mail technology companies used a one-day Summit in New York on Tuesday to exhort private sector administrators and online marketers to adopt e-mail sender authentication technology that helps block spam and phishing attacks.

Around 500 people attended the E-Mail Authentication Implementation Summit and heard speeches by Internet luminary Esther Dyson, as well as executives from Microsoft Corp., Yahoo Inc. and the Direct Marketing Association.

With problems like spam and phishing continuing to grow, companies need to implement some form of e-mail authentication technology soon, and begin preparing for the next wave in e-mail security: sender reputation services, according to e-mail experts.

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