External Emails not being Received

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Posted on by Phineas

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I am practicing my Power Pages design/build skills.

I am trying to send invitations to the site.

The invitations are not being sent/received by non-Microsoft email users.

If I send an invitation to my onmicrosoft email account, I do receive the invitation.

However, when I try to send to a Yahoo or Gmail account the invitees never get the email.

What am I missing?

Example Contact, with email -

Invitation -

Invitation Activities and Notes View for above contact -

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stampcoin 5,158 Super User 2026 Season 1 on at

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@Phineas Hi,

Suggest that offloads this to Microsoft Entra External ID / Azure AD B2B guest invitations. It gives a cleaner redemption experience and offloads email sending to Microsoft’s Entra platform, which already meets Google/Yahoo’s authentication rules out-of-the-box.

Quickstart: Add a guest user and send an invitation

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