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Sender Policy Framework (SPF) is an open standard to prevent sender address forgery. An SPF record is a type of Domain Name Service (DNS) record that identifies which mail servers are permitted to send email messages on behalf of your domain. The purpose of an SPF record is to prevent spammers from sending messages with forged addresses at your domain.

Procedure

  1. Access your DNS hosting provider's website.
  2. Edit the existing SPF record or create a new TXT record for SPF.
    If you have an SPF record for your domain, add required values to the current record forTrendAI™ . For example, change the following TXT record:
    v=spf1 ip4:x.x.x.x include:spf.example.com ~all
    Into:
    v=spf1 ip4:x.x.x.x include:<SPF record for TrendAI™ Email Security server> include:spf.example.com ~all
    The SPF record for TrendAI™ Email Security server is as follows for each serving site:
    Serving Site
    SPF record
    United States
    spf-us.tmes.trendmicro.com
    Germany
    spf.tmes.trendmicro.eu
    Australia
    spf.tmes-anz.trendmicro.com
    Japan
    spf.tmems-jp.trendmicro.com
    Singapore
    spf.tmes-sg.trendmicro.com
    India
    spf.tmes-in.trendmicro.com
    United Arab Emirates
    spf.tmes-uae.trendmicro.com
    United Kingdom
    spf.tmes-uk.trendmicro.com
    Canada
    spf.tmes-ca.trendmicro.com
    South Africa
    spf.tmes-za.trendmicro.com
    Note
    Note
    If you are using the "spf.tmes.trendmicro.com" record for your serving site, TrendAI™ recommends that you change it to the above SPF record that is reserved specifically for your site.
    You can also find the SPF record for Cloud Email Gateway Protection server in Domains > Domain name > Outbound Servers on the Cloud Email Gateway Protection console.
    Important
    Important
    A domain cannot have more than one TXT record for SPF. If your domain has more than one SPF record, a message delivery or spam classification issue may occur.