MX records and IP addresses for USA customers

Updated 2 weeks ago by admin

This article lists the MX records and IP addresses used by the Email Security service.

These records are for customers located in the USA or for customers that require email processing to take place in the USA. Other customers should review the Europe or Middle East regions.
Your Email Security product license must be provisioned in the North America region in order to use the details contained in this article.

MX RECORDS (Inbound)

You should use the following MX records.

You should always reference these records by their DNS name rather than IP address.
Hostname                      Priority 10 20 30

Smart Hosts (Outbound)

You should use the following smart hosts for outbound e-mail. Port 25 and 587 are available for outbound email.







IP Addresses

The following IP addresses and ranges are used by E-mail Security to deliver email to your server. Mail delivery operates on the standard SMTP port of 25. Please make sure your firewall and/or email server is configured to accept connections from these IP addresses:
Be sure to use the actual IP addresses in your firewall, rather than hostnames.

SPF Record

If you use an SPF record for your domain, it should be updated to include the following: 
It is recommended that outbound email only be enabled after the Time to Live (TTL) for the SPF record has passed. The use of -all in your SPF record could mean that the remote domain will reject your email if the TTL has not expired.

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