Auth-Email

Auth-Email is a mail relay that lets apps, devices, and scripts use Microsoft 365, Gmail, and many other providers through normal IMAP, POP, and SMTP logins. It handles the modern OAuth step behind the scenes, so older software and hardware can keep working without big changes. You connect your mailbox once, choose a password, and then point your app to Auth-Email’s server. It supports shared and delegated mailboxes, custom OAuth setups, legacy protocols, and centralized account management. The service also includes free email tools for testing connections, analyzing messages, and viewing or converting email files.