As far as I know, it is possible to use the Microsoft Entra SP as credentials for smtp.office365.com, similar to how it is used in Azure Communication Services. For Microsoft 365 SMTP, you can also use an Entra application with a service body for authentication.

Jan 14, 2025 · Since there are restrictions on port 25, you can use the authenticated SMTP relay services that operate over port 587. The following reference says, how to use port 587 instead of 25. send email using port 587. Update your email settings to use the SMTP relay service over port 587: SMTP Server: smtp.exchange.xxx; Port: 587; Encryption: STARTTLS

SMTP (Simple Mail Transfer Protocol) is an internet standard for email supported by most email processing servers. Connect to SMTP to send email.

SMTP (Simple Mail Transfer Protocol) is an internet standard for email supported by most email processing servers. Connect to SMTP to send email. This article describes the operations for the SMTP built-in connector, which is available only for Standard workflows in …

Feb 21, 2023 · To configure the authenticated SMTP settings that are used by POP3 and IMAP4 clients, perform the following steps: Configure the FQDN on the "Client Frontend <Server name>" Receive connector. Specify the certificate that's used …

Learn about how to use a service principal to create authentication credentials for sending emails using SMTP.

Apr 16, 2024 · Easy onboarding steps for connecting SMTP endpoints with your applications. High-volume sending support for B2C communications. Reliable delivery status on emails sent from your application in near real time.

Feb 21, 2023 · These limits include message processing rates, SMTP connection rates, and SMTP session timeout values. These limits work together to protect an Exchange server from being overwhelmed by accepting and delivering messages.

Oct 3, 2024 · Learn how to use OAuth authentication to connect with SMTP protocols and to access email data for Office 365 users. OAuth2 support for SMTP protocols as described below is available for both Microsoft 365 (which includes Office on the web) and Outlook.com users.

This article explains how you can update your requirements for SMTP relay through Exchange Online. If your organization doesn't use Inbound connector of OnPremises type, then this change doesn't affect you. Current requirements. To relay email …