Sender Policy Framework (SPF) Record triggers DNS limitation in Trend Micro™ Email Security

Product / Version includes:

Trend Micro Email Security All

Last updated: 2024/09/24

Solution ID: KA-0017857

Category: Troubleshoot

Summary

An SPF record is a type of DNS (Domain Name System) record that helps prevent email spoofing by specifying which mail servers are allowed to send email on behalf of domain.
Using relay function of Trend Micro Email Security, its SPF record should be included in the customer’s domain SPF record. The customer should set the SPF record according to Online Help Center article, Adding SPF records.
Currently, the default SPF record for Trend Micro Email Security US/EMEA/ANZ/SG regions is spf.tme.trendmicro.com. Customers may have SPF DNS query limitation issue due to a lot of IP ranges in this SPF record. For more details, refer to the IETF Datatracker article, Sender Policy Framework (SPF) for Authorizing Use of Domains in Email: DNS Lookup Limits.

To avoid this issue, you may choose to use a dedicated SPF record for each region instead of the default.

North America, Latin America and Asia Pacific: spf-us.tmes.trendmicro.com
Europe and Africa: spf.tmes.trendmicro.eu
Australia and New Zealand: spf.tmes-anz.trendmicro.com
Japan: spf.tmems-jp.trendmicro.com
Singapore: spf.tmes-sg.trendmicro.com
India: spf.tmes-in.trendmicro.com
Middle East (UAE): spf.tmes-uae.trendmicro.com

For support assistance, please contact Trend Micro Technical Support.

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Sender Policy Framework (SPF) Record triggers DNS limitation in Trend Micro™ Email Security

Sender Policy Framework (SPF) Record triggers DNS limitation in Trend Micro™ Email Security

Product / Version includes:

Summary