Microsoft says the list of more than 1,800 e-mail addresses and passwords was compiled through phishing attacks and malware.
If you forward your Web mail messages to your ISP mail account, you can delete all your Gmail, Outlook.com, and Yahoo Mail contacts and rely solely on your ISP account's address book.
Campaign titled "Don't get scroogled by Gmail" encourages users of Google's free e-mail service to dump it for Microsoft's Outlook.com.
The breach exposed names and e-mail addresses of customers of many major U.S. companies and could lead to a rise in targeted phishing attacks.
XSS vulnerability allows attacks to steal and replace tracking cookies, as well as read and send e-mail from a victim's account.
Phishing attacks have spiked this year, recent reports show. Here's a primer on what phishing is and how to avoid it.
Pacific Northwest National Lab and Jefferson National Lab shut down Web site, Internet access, and e-mail services after attacks.
Attacks illustrate vulnerabilities with Web-based e-mail services, which can let attackers into the corporate network, reports say.
Near the end of last year Epsilon partner Return Path said that thousands of e-mail addresses were stolen in a broad phishing campaign that targeted e-mail service providers.
A security vulnerability in Google's Web mail program may allow an attacker to set up filters on users' e-mail accounts without their knowledge, according to a proof of concept.