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We recommend that you set up SPF records only if you can fully control the implications it may have.
To ensure that you allow emails from Adversus servers, add the following to your existing SPF records:
spf.adversus.io
If you don't currently have SPF records set up for your domain, you'll need to create a TXT record.
Here is an example of what a TXT record can look like:
v=spf1 include:spf.adversus.io -all
To ensure that emails from your servers reach the recipient, their email servers must also be added.
Here's an example that allows emails to be sent from Adversus and Google G Suite:
v=spf1 include:spf.adversus.io include:_spf.google.com -all
After setting up your SPF records, you can use mxtoolbox.com to check your current DMARC and SPF records. You simply need to enter a domain name and click on “MX Lookup”. Links in the results will guide you to other relevant information. And you'll have a chronological history of your results.
Understanding DKIM, SPF, and DMARC
DKIM, SPF, and DMARC are all standards that enable different aspects of email authentication.
SPF allows senders to define which IP addresses are allowed to send email for a particular domain.
DKIM provides an encryption key and digital signature that verifies that an email was not faked or altered.
DMARC unifies the SPF and DKIM authentication mechanisms into a single framework and allows domain owners to specify how they want email from that domain handled if it fails an authorization test.
Do I need DKIM?
If you're a company that sends commercial or transactional email, you should surely use one or more forms of email authentication to ensure that an email comes from you or your company. One of the most important measures you can take to increase your deliverability is to properly configure email authentication standards.
You can also check your spam score with newsletters spam test by mail-tester.com .
Once you're ready to send your message (created your email template and attached it to your campaign), open a new tab in your browser and type https://www.mail-tester.com/ and see where you're supposed to send your test email to in order to receive your spam score.
Once the test email is sent, click on the blue button to check your score. This will return a score between 0 and 10 and highlight areas that might affect your deliverability, such as broken links, whether your domain has been blacklisted, and recommendations from the popular filter SpamAssassin.
This is a quick step to increase the likelihood that your emails will be delivered. However, even if your emails receive a high score on mail-tester.com, there's no guarantee they will not end up in a spam folder. If you continue to have email deliverability problems, please contact us with any questions.