Gmail / Google Workspace
~30% of global email market share
Gmail is the world's most popular email service with over 1.8 billion users. Google Workspace (formerly G Suite) provides business email using Gmail's infrastructure. Understanding Gmail's deliverability requirements is essential for any email sender.
Outlook / Microsoft 365
~10% of global email market share
Microsoft Outlook includes Outlook.com (consumer) and Microsoft 365 (business). With hundreds of millions of users, Outlook is the second-largest email provider and dominant in enterprise environments.
Yahoo Mail
~5% of global email market share
Yahoo Mail serves hundreds of millions of users worldwide. Along with AOL (now part of Yahoo), they have specific deliverability requirements that senders must follow.
QQ Mail (Tencent)
Dominant in China (~60% of Chinese email) market share
QQ Mail is China's largest email provider with over 800 million users. Sending to QQ Mail requires understanding Chinese email infrastructure and specific deliverability challenges.
iCloud Mail (Apple)
~3% of global email market share
iCloud Mail is Apple's email service integrated with all Apple devices. While smaller than Gmail or Outlook, it's important for reaching Apple's ecosystem of users.
SMTP Settings
Find the correct SMTP server, port, and security settings for each provider.
Rate Limits
Understand sending limits to avoid throttling and maintain deliverability.
Best Practices
Provider-specific tips to maximize inbox placement and avoid spam filters.
Validate Emails Across All Providers
Whylidate verifies email addresses across all major providers, helping you maintain clean lists and high deliverability.