20i SPF Setup 

SPF (Sender Policy Framework) is an email authentication protocol that helps prevent email spoofing by specifying which mail servers are allowed to send emails on behalf of your domain. 

This guide explains how to configure SPF for domains hosted on 20i’s high-performance hosting platform. 

20i SPF Requirements

Note: If you’re already using Sendmarc for SPF management, simply copy ‘include:spf.stackmail.com a mx -all’ and follow the steps here.

To authorize 20i to send emails on your domain’s behalf:

  1. Log in to your domain’s DNS dashboard.
  2. Go to the page where you can update the DNS settings on that domain.
  3. Check if a TXT record starting with v=spf1 already exists.
    • If it exists, modify the existing record to include 20i (details in the table below).
    • If not, create a new TXT record.

Example of an updated SPF record:

HostTypeValue
@ or blankTXTv=spf1 include:another.net include:spf.stackmail.com a mx -all

Example of a new SPF record:

HostTypeValue
@ or blankTXTv=spf1 include:spf.stackmail.com a mx -all
  1. Save your changes in the DNS control panel.

Allow up to 48 hours for DNS propagation, depending on your DNS host.

How to update your SPF settings using Sendmarc

For detailed instructions on how to update your SPF record through Sendmarc, refer to the Sendmarc SPF Setup Documentation. 

20i’s Documentation

Refer to 20i’s official documentation for SPF setup here.

Looking for DKIM Settings?

Find out how to configure your 20i DKIM settings here.