Minimize SMTP Recipient Quantity

  • Release version: Australia
  • Updated March 12, 2026
  • 1 minute to read
  • 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 <none>
    Fallback value 100
    Category Business Logic
    Security risk
    • 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.
    Functional impact None
    Dependencies and prerequisites None

    To learn more about adding or creating a system property, see Add a system property.