Minimize SMTP Recipient Quantity [Updated in Security Center 1.3]
- UpdatedJul 31, 2025
- 1 minute read
- Zurich
- Platform Security
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.
Set glide.email.smtp.max_recipients to the recommended value of 100 or less. 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.
More information
| Attribute | Description |
|---|---|
| Property name | glide.email.smtp.max_recipients |
| Configuration type | System Properties (/sys_properties_list.do) |
| Category | Business Logic |
| Purpose | If this property is set to an insecure value above the default value of 100, then its possible a denial of service could happen on the instance. |
| Recommended value | 100 |
| Default value | 100 |
| Configuration type | Integer |
| Security risk | (Moderate) Notifications that would exceed this limit instead create duplicate email notifications addressed to a subset of the recipient list. |
| Security risk rating | 4.9 |
To learn more about adding or creating a system property, see Add a system property.