NOTE: Adversus recommends that you do not set up SPF records unless 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 have SPF records currently set up on your domain, you'll need to create a TXT record on your domain.
Here is an example of what a TXT record may look like:
v=spf1 include:spf.adversus.io -all
To ensure that emails from your own servers make it to the recipient, their mail 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 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 mail for a particular domain.
- DKIM provides an encryption key and digital signature that verifies that an email message was not faked or altered.
- DMARC unifies the SPF and DKIM authentication mechanisms into a common framework and allows domain owners to declare how they would like email from that domain to be 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, attached it to your campaign: https://support.adversus.io/hc/en-us/articles/360015020580-How-to-create-a-mail-template) 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: Then Check Your Score. This will return a score, anywhere between 0-10, and it will highlight areas that might create problems with your deliverability, such as broken links, whether your domain has been blacklisted, recommendations from the famous filter SpamAssassin, etc.
This is a quick step to improve the probability of your emails being delivered. However, even if your emails are receiving a high score in mail-tester.com, there's no guarantee that they will not end up in a spam folder. If you continue to have email deliverability problems, please contact us with any questions.