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Google, Yahoo, and Microsoft’s email authentication requirements

Article: 000051399
Updated: February 25, 2026

What the latest email sender requirements mean for you

Google, Yahoo, and Microsoft have implemented new email authentication requirements for all email senders to improve deliverability and prevent spam. These changes were made in a continuing effort to protect their users against fraudulent messages, such as scams and phishing attempts, and will prevent any emails sent from unauthenticated email addresses from reaching the recipient’s inbox.
 

Light Bulb IconLearn more: For more information, check out our blogs on the latest requirements from Google, Yahoo, and Microsoft.

What are your options?


Rest assured, Constant Contact is here to make sure your emails land in your contacts' inboxes and meet the latest email authentication requirements, regardless of how technical you are. Take a look at the different email authentication options available to you based on what you’re using as your "From" email address:
 

  • I have my own domain and want to send email from my custom domain email address (ex: marsha@halfmoonyoga.com)

    If you own your domain, you'll need to set up self-authentication within Constant Contact if you want to use your custom domain email address for your "From" address.  Authenticating your emails will make you look more professional and strengthen your brand reputation. If you need help updating the DNS records for your domain, your IT department or webmaster can assist you. If you don't have access to your DNS records, we'll automatically rewrite your “From” email address with our shared ccsend.com domain to ensure your messages comply with the authentication requirements and get delivered to your contacts.
     
  • I use a freemail domain for my "From" email address (ex: halfmoonyoga@gmail.com) 

    If you don’t have a domain of your own, no worries! Since you’re sending from a domain that you’re not able to set up authentication for, Constant Contact has you covered. We automatically rewrite your “From” email address with our shared ccsend.com domain to ensure your messages comply with the authentication requirements and get delivered to your contacts. If you own a custom domain for your website but don’t have a matching email address set up, now's the time to do that! Sending from your own domain gives you brand recognition and helps make your emails look more professional.

 

 

Frequently asked questions


Who do these requirements impact?

These email authentication requirements impact all bulk email senders, regardless of industry, business type, or location. It’s not limited to just Constant Contact customers. 
 

Will these requirements affect my deliverability or the likelihood that my emails will go to junk/spam?

With these requirements, Google, Yahoo, Microsoft, and many other receiving mailbox providers will treat unauthenticated email suspiciously. But don’t worry! At Constant Contact, we believe that no email should leave our system unless it meets the authentication requirements. If you don't have your own domain to authenticate with, or just haven’t self-authenticated yet, we'll rewrite your “From” email address to a shared domain that we can authenticate for you to help keep your emails from landing in the junk folder.   
 

How do I check if I meet the requirements?

If you've successfully self-authenticated your domain, you’ll see it marked as "Authenticated" on the Account emails tab in your account settings.

My Account, Account Emails tab, Domains table, and Authenticated domain

What if I don’t take any action?

Keep calm and email on. If you don’t take action, we automatically rewrite your “From” email address with our shared ccsend.com domain, which meets the email authentication requirements. For example: <carlscoffee@gmail.com> will become <carlscoffee-gmail.com@shared1.ccsend.com>. That being said, setting up self-authentication and sending from your own domain is an industry best practice and helps build your brand’s sending reputation. 
 

Is there a cost for setting up self-authentication?

No, there's no cost to set up self-authentication within Constant Contact. However, keep in mind that any services performed outside of your account with a professional or domain provider could incur a fee.
 

I want to set up my own domain. How do I do that?

Constant Contact doesn't offer domain hosting services, but you can purchase a custom domain from web hosting sites like bluehost.com or hostgator.com, or from domain hosting sites like domain.com or bigrock.com.
 

I don’t use Gmail, Yahoo, or Microsoft for my "From" email addresses. I use my own domain. How does this impact me?

If you want to send from your own domain, you’ll need to set up self-authentication within Constant Contact and make sure you add the DKIM and DMARC records to your DNS settings. 

No matter what domain you send your emails from—whether it’s your own domain that you self-authenticate or our shared ccsend.com domain—authentication is required for Google, Yahoo, and Microsoft to deliver your email to their users’ inboxes. 
 

My domain is used across multiple Constant Contact accounts. Do I need to set up self-authentication for each account? 

Yes, you'll need to set up self-authentication using a TXT record and add the record to your DNS settings for each Constant Contact account. You can’t self-authenticate using CNAME records if the same domain is used in multiple accounts.
 

What if I use multiple “From” email addresses with different domains?

At this time, you can only authenticate one domain in an account to use for your “From” addresses. If you need to email from multiple entities, we recommend setting up a separate Constant Contact account for each to avoid issues with unsubscribes, since your email footer defaults to a single entity.
 

Are other email clients besides Gmail, Yahoo, and Microsoft impacted by this?

While these requirements are primarily being publicized by Google, Yahoo, and Microsoft, we’ve seen an increasing number of ISPs and mailbox providers imposing stronger authentication requirements on inbound mail. We expect that all email clients will soon enforce these stronger requirements.
 

How does this affect my contacts? 

This should not affect your contacts, aside from helping to prevent them from receiving spam. If your “From” email address will be rewritten with our shared ccsend.com domain, you may want to give your contacts a heads-up so they know your emails will be coming from a different address.

 

Will I still receive replies from my contacts?

Your “Reply-to” email addresses are not impacted, and you will continue to receive replies from your contacts.

Note: In some cases, if a contact has an auto-reply/vacation message set, it's sent to your "From" email address instead of your "Reply-to" email address. Unfortunately, Constant Contact can't control where these auto-reply messages are sent, as it's entirely dependent on the recipient's email provider. If you want to ensure you receive these auto-replies, use an authenticated custom domain for your "From" address instead of a freemail or unauthenticated domain, which gets rewritten upon send with our ccsend.com domain and are not tied to an actual email inbox.

 

Do I need to do anything different with my email campaigns?

No, there’s nothing different you need to do when sending your emails. The only change will be that you'll only be able to send from email addresses at your authenticated domain, whether that’s your custom domain or your customized subdomain with our ccsend.com domain.
 

Will this affect my email reporting?

Our research has shown that properly authenticated email tends to get better open and click rates. 
 

Where is the easy unsubscribe option located?

There's nothing you need to do to set up easy unsubscribe for the latest requirements. Constant Contact already adds the correct header for this requirement, and once your email is properly authenticated, Google, Yahoo, and Microsoft will display an “unsubscribe” link at the top of the messages for their users.
 

What is the difference between a DMARC policy and a DMARC record?

These terms are used interchangeably, but essentially, a DMARC record is the information you need to add to your DNS records to implement a DMARC policy for your domain. A DMARC policy is the statement you make in your DMARC record telling receivers what to do with email that fails a DMARC check. For more information, take a look at this article explaining what a DMARC policy is.



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