STELA Mailing – Terms of Service

Last updated: 06.01.2026

These Terms of Service govern the use of STELA Mailing, an application provided by Software Testing Bureau (BILESTAR S.A.) as part of the STELA platform.

By connecting a Microsoft account to STELA Mailing, the user authorizes STELA to access the mailbox associated with that account exclusively for the purpose of executing automation processes configured by the user or by the organization using STELA.

1. Purpose of the application

STELA Mailing allows a Microsoft mailbox to be connected to the STELA platform so that automated processes can operate on email messages as part of RPA flows or business process automation.

The application must be used only for legitimate business, operational, testing, support, or automation purposes.

2. Access to the Microsoft account

When a user connects a Microsoft account, Microsoft may request consent for STELA Mailing to access certain permissions related to the mailbox.

Depending on the configuration enabled by the user or by the organization, STELA Mailing may request permissions to:

• read messages from the mailbox;
• query the inbox;
• send messages on behalf of the connected user;
• reply to messages;
• forward messages;
• delete messages;
• maintain access after the initial authorization, so that configured automations can continue to operate without requiring the user to sign in again.

STELA Mailing does not obtain or store the user’s Microsoft password. Authentication is managed directly by Microsoft through OAuth 2.0.

3. Available actions on the mailbox

Once the Microsoft account has been authorized, STELA Mailing may allow automations configured in STELA to execute the following actions on the connected mailbox:

• Send Mail: allows an email message to be sent from the connected account.
• Inbox: allows the inbox of the connected account to be queried.
• Read Mail: allows the content, metadata, and attachments of email messages to be read when required by the configured automation.
• Forward Mail: allows an existing email message to be forwarded to one or more recipients.
• Reply Mail: allows a received email message to be replied to.
• Delete Mail: allows email messages to be deleted, or moved to the deleted items location according to the behavior permitted by Microsoft and the mailbox configuration, when required by the configured automation.

These actions are executed only as a result of automations configured by the user or by the organization responsible for the use of STELA.

For more information about the mail commands available in STELA, the user may consult the corresponding documentation in the STELA mail commands wiki.

4. Use of mailbox data

STELA Mailing accesses mailbox data only to execute automations configured in STELA.

Mailbox data may be used to:

• identify incoming messages relevant to an automation;
• query the inbox;
• read message content and metadata required by a configured process;
• extract attachments or information needed for the automation;
• send emails when explicitly required by the automation;
• reply to or forward emails as part of an automated flow;
• delete messages when such action has been defined within the automation;
• record execution results, logs, or evidence related to the automated process.

STELA Mailing does not use mailbox data for advertising, user profiling, resale of information, or purposes unrelated to the execution of the configured automations.

5. Responsibility of the user and the organization

The user and the organization using STELA are responsible for:

• ensuring they have sufficient authorization to connect the mailbox to STELA;
• configuring automations in accordance with applicable laws, contracts, internal policies, and confidentiality obligations;
• controlling which users have access to STELA and to the connected credentials;
• reviewing the behavior of automations before using them in production environments;
• supervising the use of STELA Mailing within their organization;
• verifying that email sending, reading, forwarding, replying, or deletion actions are authorized and appropriate for the corresponding automated process.

STELA executes the automation logic configured by the user or by the organization. The user or the organization remains responsible for the actions performed through their automations.

6. Security

STELA uses OAuth 2.0 tokens to access Microsoft services. Access tokens and related credentials are stored using security controls designed to prevent unauthorized access.

Users may revoke access to STELA Mailing at any time from their Microsoft account settings or through the Microsoft Entra ID administrative options corresponding to their organization.

In addition, STELA Administrators may unlink the account from the STELA Administration Panel, Accounts menu.

7. Data retention

STELA may retain configuration data, execution logs, technical evidence, and token information necessary to operate the connected mailbox and execute the configured automations.

The retention period may depend on the STELA environment used, the customer’s configuration, the applicable contractual terms, and the operational requirements of the service.

8. Use restrictions

Users must not use STELA Mailing to:

• send spam, phishing, malware, or unauthorized communications;
• access mailboxes without proper authorization;
• read, forward, reply to, delete, or send messages without sufficient authorization;
• violate third-party rights, privacy rights, contractual obligations, or applicable laws;
• bypass security controls or Microsoft account policies;
• process information in a manner not authorized by the mailbox owner or by the responsible organization;
• execute automations that may cause harm, loss of information, or misuse of systems or data.

9. Availability and changes

STELA Mailing depends on Microsoft services, network availability, account permissions, and customer configuration. Software Testing Bureau (BILESTAR S.A.) does not guarantee uninterrupted availability of Microsoft services or third-party integrations.

These Terms may be updated periodically. Continued use of STELA Mailing after the publication of an updated version implies acceptance of the modified Terms.

10. Revocation of access

Users or administrators may revoke application access from the Microsoft account settings or from Microsoft Entra ID administration.

In addition, STELA Administrators may unlink the account from the STELA Administration Panel, Accounts menu.

If access is revoked, STELA Mailing may no longer correctly execute automations that depend on the connected mailbox.

11. Contact

For questions about these Terms of Service or about the use of STELA Mailing, you may contact: