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

  • Microsoft 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 Microsoft 365 SMTP server will generate one of the following errors if Use secure connection is enabled in the node.

    • "Error: Invalid login: 504 5.7.4 Unrecognized authentication type [{server}.outlook.com]"
    • "Error: 34403852288:error:1408F10B:SSL routines:ssl3_get_record:wrong version number:/usr/src/crypto/openssl/ssl/record/ssl3_record.c:358

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