What Are the SMTP Settings for Office 365? Step-by-Step Guide


The SMTP settings for Office 365 (now Microsoft 365) are: SMTP server: smtp.office365.com, Port: 587, Encryption: STARTTLS (TLS), and Authentication: required using your full email address and password. These settings are used to send outgoing email securely from email clients, applications, websites, and devices.

Now let’s explore these settings in detail, explain when to use them, and understand how SMTP works within Office 365.

Microsoft 365 SMTP Settings Overview

Here are the official SMTP settings for Office 365 (Microsoft 365):

SettingValue
SMTP Serversmtp.office365.com
Port587
EncryptionSTARTTLS (TLS)
AuthenticationRequired
UsernameFull email address (e.g., user@yourdomain.com)
PasswordEmail password or app password

These settings are used for SMTP client submission, which allows users and applications to send emails through Microsoft 365 servers.

Read More: What Are the SMTP Settings for Office 365?

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