How Free Email Providers Affect Delivery

If you use a free email domain as your campaign's From email address it may cause delivery problems, so MailChimp offers a way to help.

In this article, you'll learn more about how free email providers can affect delivery.

Why We Change Your From Email Address

Recently, many free web email domains like aol.com, yahoo.com, mac.com, rocketmail.com, ymail.com, and .ru have updated their email protocols to be more strict about bulk email marketing. Their policies prevent spam and email scams, but here's what it means for you. Any mail sent through a platform like MailChimp with a From email address at those domains will be rejected by most receiving servers.

For example, if someone sends a MailChimp campaign with a yahoo.com From email address, this looks suspicious to receiving servers since they know the message wasn't sent through Yahoo Mail.

This sounds a little scary, but MailChimp can help! We'll make a small change to your address to help ensure delivery. You'll see this notification on the Setup step of the Campaign Builder when you input a free domain as your From email address.


This notification lets you know that we'll automatically change your From email address by adding an extension to it. The extensions will look something like this when your campaigns are delivered to your subscribers.

  • send.mailchimpapp.com  

  • mail.mailchimpapp.com

So if your From email address is HathwayUniversity@yahoo.com, we'll change it to HathawayUniversity@yahoo.com.send.mailchimpapp.com when your email is delivered.  The altered From email address encourages receiving servers to accept your message.

Any campaign replies from subscribers will still go to the From email address you entered in the Setup step of the Campaign Builder. All the changes are on our side, so you can keep using your free webmail inbox without any worries!

How to Get a Business Email

If you've chosen a free web domain as your From email address and you don't like the way it looks, the best thing you can do is purchase your own business email, such as  you@yourcompany.com.  

When you use a custom business email for the From email address of all your campaigns, your emails will fit your company's style and brand, and your deliverability may improve.

Read the article Register a Domain for more details.

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