---
title: "Modifying an Application Servers SMTP Settings"
slug: "modifying-application-servers-smtp-settings"
description: "This document shows how to change an Application Server's SMTP Settings. This action can be completed post-installation of Decisions via the Edit Settings button on the Decisions Installer. "
updated: 2025-06-06T15:42:37Z
published: 2025-06-06T15:42:37Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://documentation.decisions.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Modifying an Application Servers SMTP Settings

## Overview

Decisions provide email functionality, allowing users to send an email from the application to a user. To learn more, refer to [Email and SMTP in Decisions](https://documentation.decisions.com/v9/docs/email-and-smtp-in-decisions).

Post-[installation](https://documentation.decisions.com/v9/docs/installation-guide), SMTP Settings may be adjusted to send and receive emails. This can be done via the [Settings.xml](https://documentation.decisions.com/v9/docs/system-settings-overview-settings-xml) file.

Deprecation of Basic authentication in Exchange Online:Due to Microsoft's depreciation of basic authentication for Office 365 accounts, users with Office 365 accounts will need additional configuration to ensure the accounts will work with email steps. To configure the OAuth Authentication for Office 365, refer to [Enabling OAuth Authentication for Microsoft Office 365 Email Accounts](https://documentation.decisions.com/v9/docs/enabling-oauth-authentication-for-microsoft-office-365-accounts).

SMTP Setting Configurations

- For Office365 SMTP settings, navigate [here](https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-office-3).
- For Gmail SMTP settings, navigate [here](https://support.google.com/a/answer/176600?hl=en).
- For Outlook SMTP settings, navigate [here](https://support.office.com/en-us/article/pop-imap-and-smtp-settings-for-outlook-com-d088b986-291d-42b8-9564-9c414e2aa040).

---

## Modifying SMTP Settings via Settings.xml

1. Navigate to**C:\Program Files\Decisions\Decisions Server** and open **Settings.xml**.
2. Navigate to the SMTP settings under <Mail> and update the settings with the proper configuration for the associated email server.  
  

| Setting Name | Description |
| --- | --- |
| ByPassSMTPServer | If this option is enabled (set to true), any email sent will ignore the configured SMTP settings. |
| ServerAddress | This setting specifies the address of the SMTP server used to send emails from the application. |
| ClientDomain | The client's domain name used for identifying the sender's domain during the SMTP communication. |
| Port | This setting determines the port number through which the application communicates with the SMTP server. Common values include 25 (unencrypted), 465 (implicit SSL), and 587 (explicit SSL/TLS). |
| RequiresAuthentication | When set to "true," this indicates that the SMTP server requires authentication using credentials to authorize sending emails. |
| UseOauth | When set to "true," the application uses OAuth for authentication, which is a more secure method than sending a plain username and password. |
| OauthTokenId | This setting holds the unique identifier (token) associated with the OAuth authentication process. |
| Username | The username used for authentication when sending emails via the SMTP server. |
| Password | The corresponding password associated with the provided username for SMTP server authentication. |
| UseSSL | If enabled, the application establishes a secure connection to the SMTP server using SSL/TLS encryption. |
| UseImplicitSSL | When set to "true," the application uses implicit SSL, which means the encryption is established right from the beginning of the connection. |
| SkipCertificateRevocationCheck | If set to "true," the application skips checking for certificate revocation. However, this might reduce security if not necessary. |
3. Save and close the file.
4. [Restart](https://documentation.decisions.com/v9/docs/restart-decisions-application) the Decisions application.

---

For further information on Settings, visit the [Decisions Forum](https://community.decisions.com/categories/Settings).