Create a system address filter

  • Release version: Australia
  • Updated March 12, 2026
  • 1 minute to read
  • Define how email address filters apply to inbound and outbound email.

    Before you begin

    Complete the steps in Set email address filters.

    Role required: email_account_admin

    About this task

    You can use a combination of allowed list and denied list email address filters in a system address filter.

    A system address filter blocks a domain or address that appears only on denied lists and never on allowed lists. To ensure that a system address filter effectively blocks a certain domain or address, check for the following:
    • The domain or address is included in at least one denied list
    • The domain or address is not included in any allowed list

    Procedure

    1. Navigate to All > System Mailboxes > Administration > System Address Filters, and then click New.
    2. On the form, fill in the fields.
      Field Description
      Name Name of the system address filter.
      Active Option to activate the system address filter.
      Type Type of system address filter. Select one of the following:
      Outbound
      Control which domains and email addresses can receive email from your instance. Select this option if you plan to use the system address filter for an SMTP server.
      Inbound
      Control which domains and email addresses can send email to your instance. Select this option if you plan to use the system address filter for an IMAP or POP3 server.
      Application Application scope of the system address filter.
      Default

      Option to use this system address filter as the default inbound or outbound filter.

      To control senders and recipients for a specific email account, leave this field cleared.

      Short description Description of the system address filter.
      Email Address Filters

      Email address filters to apply to the system address filter.

      By default, the maximum number of email address filters that you can associate with a single system address filter is 100. You can reconfigure this limit by setting the glide.email_system_address_filter.max_address_filters property.

    3. Click Submit.

    Result

    A default outbound filter applies to all active SMTP email accounts automatically. A default inbound filter applies to all active IMAP or POP3 email accounts automatically.

    For a non-default filter, the next step is to apply the filter to an email account manually. For more information on applying a filter to an email account, see Create an email account.