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Office 365 (O365) Outlook Email Tips and Tricks
Office 365 Outlook

The following suggestions should be followed to ensure smooth operation when interacting with Office 365's IMAP and SMTP servers.

email in Node Configuration

email out Node Configuration

  • Office 365 SMTP server uses port 587 and is configured to use STARTTLS. The communication channel will automatically be upgraded to TLS based on Microsoft‘s STARTTLS server configuration.

    The O365 SMTP server will generate the following error if STARTTLS is disabled on the client-side, so it is not possible to send an email insecurely. "Error: Invalid login: 504 5.7.4 Unrecognized authentication type [{server}.outlook.com]"

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