Why can some emails display as “on behalf of” or “via”?

Starting in February 2024, Gmail and Yahoo are rolling out new authentication requirements which require using a custom DKIM authenticated domain with DMARC reinforced.

In April 2025, Microsoft joined them with a similar announcement.

GetResponse strongly advises all senders to use email addresses from their own private domains

as a from email address, and to configure both DKIM

and DMARC.

For additional details on these modifications, refer to our blog

Regardless of your ‘From’ address settings which you choose for each message, it may happen that some of your subscribers

see:

From: [xyz@getresponse-mail.com] on behalf of [your_from_email]

-OR-

From: John Smith [your_from_email] via getresponse.com

The situation described above may occur for only some of your subscribers using certain email clients

and email applications like Gmail and Outlook. To avoid this, you would need to set up a DKIM signature for your sending domain. This manual will provide instructions on how to set that up.

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