Gmail, Hotmail, and Yahoo Mail problems are solved with Postman, the first and only OAuth 2.0-capable SMTP mailer for WordPress.
Use WordPress to Power Your OAuth Server
Sell memberships and restrict access to content with WordPress and Memberful.
Simple secure login and user management for WordPress through your Google Apps domain (uses secure OAuth2, and MFA if enabled)
Provides automatic authentication against OpenID Connect API.
Provides automatic authentication against Google OAuth2 API.
This plugin replaces the default WordPress shortlinks with Bit.ly shortlinks for your single site or multisite WordPress network.