office 365 smtp relay modern authentication

This functionality is built on top of Microsoft Identity platform (v2.0) and supports access to email of Microsoft 365 (formerly Office 365) users.ĭetailed step-by-step instructions for authenticating to IMAP and SMTP AUTH protocols using OAuth are now available for you to get started. This feature announcement is for interactive applications to enable OAuth for IMAP and SMTP.įor additional information about non-interactive applications, please see our blog post Announcing OAuth 2.0 Client Credentials Flow support for POP and IMAP protocols in Exchange Online.Īpplication developers who have built apps that send, read or otherwise process email using these protocols will be able to implement secure, modern authentication experiences for their users. Today, we’re excited to announce the availability of OAuth 2.0 authentication for IMAP and SMTP AUTH protocols to Exchange Online mailboxes. Ever since we announced our intention to disable Basic Authentication in Exchange Online we said that we would add Modern Auth (OAuth 2.0) support for the IMAP, POP and SMTP AUTH protocols.

Office 365 smtp relay modern authentication