Minimize SMTP Recipient Quantity
The glide.email.smtp.max_recipients specifies the maximum number of recipients the instance can list in the To: line for a single email notification.
The glide.email.smtp.max_recipients system property specifies the maximum number of recipients the instance can list in the To: line for a single email notification. Notifications that would exceed this limit instead create duplicate email notifications addressed to a subset of the recipient list. Each email notification has the same maximum number of recipients.
Ensure that the property glide.email.smtp.max_recipients is set to 100 or less.
More information
|
Attribute |
Description |
|---|---|
|
Configuration name |
glide.email.smtp.max_recipients |
|
Configuration type |
System Properties (/sys_properties_list.do) |
|
Data type |
String |
|
Recommended value |
An integer less than or equal to 100 |
|
Default value |
100 |
|
Fallback value |
100 |
|
Category | |
|
Security risk |
|
|
Functional impact |
None |
|
Dependencies and prerequisites |
None |
Parent Topic:Business Logic
--- title: Minimize SMTP Recipient Quantity description: The glide.email.smtp.max\_recipients specifies the maximum number of recipients the instance can list in the To: line for a single email notification. locale: en-US canonical_url: https://www.servicenow.com/docs/r/australia/platform-security/instance-security-hardening-settings/sc-max-smtp-recipients.html release: australia product: Instance Security Hardening Settings classification: instance-security-hardening-settings topic_type: reference last_updated: "2026-09-10" reading_time_minutes: 1 breadcrumb: [Business Logic, Hardening settings, Platform Security] --- # Minimize SMTP Recipient Quantity The **glide.email.smtp.max\_recipients** specifies the maximum number of recipients the instance can list in the **To:** line for a single email notification. The **glide.email.smtp.max\_recipients** system property specifies the maximum number of recipients the instance can list in the To: line for a single email notification. Notifications that would exceed this limit instead create duplicate email notifications addressed to a subset of the recipient list. Each email notification has the same maximum number of recipients. Ensure that the property **glide.email.smtp.max\_recipients** is set to `100` or less. ## More information <table id="table_ajc_b43_3kb"><thead><tr><th> Attribute </th><th> Description </th></tr></thead><tbody><tr><td> Configuration name </td><td> **glide.email.smtp.max\_recipients** </td></tr><tr><td> Configuration type </td><td> System Properties \(/sys\_properties\_list.do\) </td></tr><tr><td> Data type </td><td> String </td></tr><tr><td> Recommended value </td><td> An integer less than or equal to 100 </td></tr><tr><td> Default value </td><td> 100 </td></tr><tr><td> Fallback value </td><td> 100 </td></tr><tr><td> Category </td><td> [Business Logic](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/platform-security/instance-security-hardening-settings/sc-business-logic.md) </td></tr><tr><td> Security risk </td><td> - Severity score: 4.9 - CVSS rating: Medium - Security risk details: This can lead to resource exhaustion and potentially cause a Denial of Service \(DoS\) condition on the email subsystem or the instance itself. Limiting recipient counts is essential to prevent abuse and maintain system performance and availability. </td></tr><tr><td> Functional impact </td><td> None </td></tr><tr><td> Dependencies and prerequisites </td><td> None </td></tr></tbody> </table>To learn more about adding or creating a system property, see [Add a system property](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/platform-administration/t_AddAPropertyUsingSysPropsList.md). **Parent Topic:**[Business Logic](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/platform-security/instance-security-hardening-settings/sc-business-logic.md)
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