A public domain email address is one provided by free email service providers such as Gmail, Yahoo!, AOL, Outlook, etc.
Yahoo! and AOL have restricted the use of their domain addresses for sending campaigns, as they've made changes to their DMARC policies for security reasons. They’ve instructed other email service clients to reject the emails that come from Yahoo/AOL sender addresses but not through Yahoo/AOL servers. If you try to add sender addresses from public domains in Zoho Marketing Automation, the system will alert you. Consider the scenario below:
If you add a public domain reply to address, you will see the same error message:
Due to increasing email-based spam aiming to acquire sensitive information (such as credit card details), email service providers made a few changes to their policies to increase email security by complying with DMARC policy. These changes help ensure that only emails from genuine senders reach the recipients' inboxes.
Anyone can use a public domain to send emails, including spammers, while genuine marketers should have their own business domain to send emails from.
As Yahoo! and AOL have already restricted use of their domains to send emails from other servers, it is very likely that other public email services will follow suit. That's why we recommend you do not use any public domain email address.
Gmail pushes emails from public domain addresses to the spam folder and warns the recipients with a message that they were unable to verify the sender domain:
If you use your own business domain, the reputation of your domain, and therefore your email deliverability, will depend only on your own sending practices, and not on a public domain's reputation. Using your own business domain helps promote trust, familiarity, and easy recognition among your leads, and helps you improve and control your email deliverability and increase business.
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