Hi @Lela Keller ,
User-defined subscriptions that are created according to the permissions granted by the Manage individual subscriptions task contain a pre-set user name that is based on the domain user account. When the user creates the subscription, the recipient name in the To: field is self-addressed using the domain user account of the person creating the subscription.
If you are using an SMTP server or forwarder that uses e-mail accounts that are different from the domain user account, the report delivery will fail when the SMTP server tries to deliver the report to that user.
See more: https://learn.microsoft.com/en-us/sql/reporting-services/install-windows/e-mail-settings-reporting-services-native-mode-configuration-manager?view=sql-server-ver16#configuration-options-for-setting-the-to-field-in-a-message
Best Regards,
Joy
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