problem sending email with yahoo accounts

Hi BestPlanChoice,

Good day, and thank you for reaching out to the Q&A Forum.

If I understand correctly, you are experiencing issues sending emails from a Yahoo account, and the link you shared suggests you are running into a 4.4.7 or similar delivery error along the way. To help me better understand the situation, could you please share a bit more detail:

1. What is the exact NDR (non-delivery report) message or error code you are seeing? A screenshot would be very helpful, with any sensitive details masked.
2. Are you sending from a personal Yahoo Mail account to a Microsoft 365 / Exchange Online recipient, or to another mail provider?
3. Have you already tried the steps in the article you linked to? If yes, what was the result?
4. Is the issue happening with all recipients, or only with specific addresses or domains?
5. When did the issue start, and did anything change recently (e.g., new email setup, recent Yahoo account changes, or any new DNS / SPF / DKIM / DMARC settings if you manage your own domain)?

Please also keep in mind that the article you referenced is intended for Exchange Online email administrators on the receiving side, who would need to investigate why their tenant is blocking or delaying messages from external senders. As a Yahoo sender, the actions on your side are usually limited to ensuring the message content does not trigger spam filters, the sending account is in good standing, and the recipient address is correct.

Once you share these details, I will do my best to point you toward the right next step. Thank you for your patience and understanding. I'm looking forward to your reply.

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