Recently, Microsoft announced that it will follow Google and Yahoo and require bulk senders to comply with email authentication standards such as SPF, DKIM, and DMARC. The company will start enforcing these requirements across its domains on May 5, 2025, by routing non-compliant mail directly to the junk folder.
These standards are nothing new and have long been considered a best practice, but having the three largest mailbox providers all agree on one thing speaks to the importance of securing your domain with authentication! These large mailbox providers are asking everyone to do this important work in order to distinguish between legitimate and fraudulent senders. Preventing the bad stuff from making it to the inbox will help to preserve email as a useful tool for years to come.
What to do next?
If you are a Constant Contact customer, don’t worry — we’ve got you covered. We offer a lot of options to ensure your mail gets delivered. The best option, if you are sending from your own domain, is to make sure you’ve got self-authentication set up! Don’t have your own domain to authenticate with? That’s ok, we now offer the ability for you to set up your own custom subdomain within our product.
But I’m not a bulk sender
Manager of ISP Relations at Constant Contact
