Sender Policy Framework (SPF) is an open standard specifying a technical method to prevent sender address forgery. We strongly recommend creating an SPF record to ensure that recipients recognize forged messages sent using your domain. 

Note: in most cases there must be only one record per domain, and it must be published as a TXT resource record only.

Intermedia Mail Server Only

If you use only Intermedia mail (SMTP) servers to send mail from your domain the SPF record for your domain name should look this way:

your_domain.com, TXT, "v=spf1 include:spf.intermedia.net ~all"

No action is required if your domain Name Servers point to Intermedia, and you do not send emails from servers other than $companyName’s. To comply with this standard and ensure successful delivery of mail sent by Intermedia customers, SPF records have been created for each domain that has been added to Intermedia DNS servers.

Important: there are two types of the SPF qualifiers:

  • ~all = If the SPF check fails, the result is a soft failure. The SPF failure will be documented in the headers, but the email will be accepted.
  • -all= If the SPF check fails, the result is a hard failure. The SPF test will be successfull only if the source Email Server fits the SPF entry, if not the email will be rejected.

Intermedia Mail Server Plus Another Mail Server

If you use Intermedia mail (SMTP) servers to send mail from your domain and you have another mail server that sends messages from your domain your SPF record should look this way: 

your_domain.com, TXT, "v=spf1 A:my_smtp_server_name include:spf.intermedia.net ~all" 

OR 

your_domain.com, TXT, "v=spf1 MX:your_mx_server_name include:spf.intermedia.net ~all" 

OR 

your_domain.com, TXT, "v=spf1 ip4:your_smtp_server_IP include:spf.intermedia.net ~all"

To change SPF record (the following steps apply only if you host your DNS records with Intermedia):

  • Exchange hosting account administrators
    1. Navigate to Services > Domains
    2. Click the Domain name > click Display DNS Records.

  • Web Hosting account administrators
    1. Navigate to Domain Names > Domains Manager > click the Domain name to edit the records.
    2. Type the correct record into Resource Data (Points To) for TXT type.
    3. Click Update Records

Important: you may want to check SPF record syntax by using  SPF checker tool.

Note: some DNS hosting providers (such as Amazon DNS Hosting) require users to set up SPF records of two types (TXT and SPF), instead of publishing only TXT type record. In this case the SPF record should look this way:

your_domain.com, TXT, "v=spf1 include:spf.intermedia.net ~all"

your_domain.com, SPF, "v=spf1 include:spf.intermedia.net ~all"

If a domain has records of both types, they must have identical content. For more details, check RFC4408. We recommend to check the setup with your DNS hosting provider.