---
sourceDocument: Xanadu ServiceNow AI Platform Administration
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/xanadu/platform-administration

 Release :

    - xanadu

ft:locale :

    - en-US

ft:publication_title :

    - Xanadu ServiceNow AI Platform Administration

ft:clusterId :

    - platadm

bundleId :

    - platadm

workflow :

    - Platform


---

# System address filters

# System address filters {#ariaid-title1}

* Release version: Xanadu
* 
* Updated August 1, 2024
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Prevent your system from communicating with untrusted domains and email addresses.

System address filters control who can communicate with your instance via email. You can
improve email security by filtering domains and email addresses that you find suspicious.

For example, you might identify `example.com` as a suspicious domain. You can
stop receiving emails from `example.com` by specifying the domain in a system
address filter. You can also use another system address filter to prevent your system from
sending emails to `example.com`.  
There are two types of system address filters:

Outbound
:   Controls which domains and email addresses can receive email from your instance.

Inbound
:   Controls which domains and email addresses can send email to your instance.

When setting up system address filters, you can create one default outbound filter and one
default inbound filter. 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.

To control senders and recipients for a specific email account, create a non-default filter
and then apply it to the account.

## Before setup {#system-address-filters__section_wfj_55y_llb}

Before you set up system address filters, consider doing the following:

* Monitor your email to identify suspicious domains and email addresses.Using Security Center, you can monitor the blocked and allowed incoming email metrics for your instance. For more information, see [Designate untrusted and trusted email domains](https://www.servicenow.com/docs/access?context=designate-untrusted-trusted-email-domains&version=xanadu&pubname=xanadu-platform-security&ft:locale=en-US).

* Designate someone to set up system address filters by assigning them the email_account_admin role.
{#system-address-filters__ul_b15_hvy_llb}

## Setting up system address filters {#system-address-filters__set-up-sys-add-filt}

To set up system address filters for your instance, complete the following tasks:

1. [Set email address filters](https://servicenow-prod.fluidtopics.net/vJ4~2EvwsRMaOL6aRo2mow "Specify which domains and email addresses are allowed or disallowed.")

   Specify which domains and email addresses are allowed or disallowed.
2. [Create a system address filter](https://servicenow-prod.fluidtopics.net/0eMCo2kmapo8w_ooXipTIQ "Define how email address filters apply to inbound and outbound email.")

   Define how email address filters apply to inbound and outbound email.
{#system-address-filters__ol_dcg_vdw_klb}

## Next steps {#system-address-filters__section_rh1_v3y_llb}

After you set up system address filters, configure email filters for an added layer of
security. Email filters enable you to ignore an inbound email or move it to a particular
mailbox. For more information on configuring email filters, see [Email filters](https://servicenow-prod.fluidtopics.net/S5Dd5GwaX11IaUhI~u_9jw "Specify which inbound emails to ignore or move to a particular mailbox.").
* **[Set email address filters](https://servicenow-prod.fluidtopics.net/vJ4~2EvwsRMaOL6aRo2mow)**   
  Specify which domains and email addresses are allowed or disallowed.