Yahoo! Mail
Yahoo! Mail has over 250 million users. Get background information on ensuring email delivery at the world's most used webmail service. Plus information on how Yahoo! displays emails.
Key documents
Yahoo Postmaster
The help pages for senders of email, covering best practices, feedback loops, CertifiedEmail, DomainKeys and other important aspects of getting email into inboxes at Yahoo! Mail.
Standards compliance
Review of how well the new Yahoo! Mail interface treats CSS and other email design elements in relation to proposed standards.
Popular articles
Deliverability insights from Yahoo! Mail
A review of some public comments made by their anti-spam czar.
Email and webmail statistics
Collates public information to estimate the relative popularity of the main webmail services out there.
Webmail service names
A brief overview of what the big webmail services actually call their products, so when people talk about Windows Live Hotmail you know what they mean.
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Will Yahoo block messages that aren't signed?
An interview with Yahoo! Mail's anti-abuse product manager on their use and plans for DomainKeys Identified Mail.