The Sender Details API contains the information that is displayed as the sender’s name and email address when sending an email from your Wix site.
With the Sender Details API you can:
Before you begin, it is important to note the following information.
If you send an email campaign with a public email domain (e.g. @gmail.com or @yahoo.com), the email address isn't displayed in the 'from' header. Instead, the email address is replaced with @wixemails.com (or @wixsitemail.com for free users), and the sender's email is placed in the 'reply-to' header.
If you send an email campaign with an email from a Wix managed domain, that email will be displayed in the 'from' header. If you send an email from a custom domain that is not managed by Wix, a line will be inserted that states that the email was sent via wixemails.com.