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E-mail error smtp;550 5.7.515 Access denied

Anonymous
2025-05-29T15:23:41+00:00

Hello, i am trying to send emails from my domain to @outlook or @hotmail, but they all return with an error:

StartFragmentReporting-MTA: dns;mail112113.delibird0005.locaweb.com.br
X-PowerMTA-VirtualMTA: lw_filtro_rcpt_d
Received-From-MTA: dns;mcbain0013.email.locaweb.com.br (189.126.112.18)
Arrival-Date: Thu, 29 May 2025 10:40:45 -0300

Original-Recipient: rfc822;@hotmail.com
Final-Recipient: rfc822;@hotmail.com
Action: failed
Status: 5.0.0 (undefined status)
Remote-MTA: dns;hotmail-com.olc.protection.outlook.com (52.101.68.13)
Diagnostic-Code: smtp;550 5.7.515 Access denied, sending domain ENGENHARIADOCORPO.COM.BR doesn't meet the required authentication level. The sender's domain in the 5322.From address doesn't meet the authentication requirements defined for the sender. To learn how to fix this see: https://go.microsoft.com/fwlink/p/?linkid=2319303 Spf= Pass , Dkim= Fail , DMARC= Pass [CP5P284MB2199.BRAP284.PROD.OUTLOOK.COM 2025-05-29T13:48:24.513Z 08DD9E7AE150CC88] [DU7P251CA0015.EURP251.PROD.OUTLOOK.COM 2025-05-29T13:48:24.597Z 08DD9DADB13D86F4] [DB1PEPF000509F6.eurprd02.prod.outlook.com 2025-05-29T13:48:24.605Z 08DD9E906A653D02]
X-PowerMTA-BounceCategory: policy-relatedEndFragment

How can i proceed?

Outlook | Web | Outlook.com | Email

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  1. Anonymous
    2025-06-17T22:47:40+00:00

    I have started experiencing the very same issue when sending emails from my Juno account to my best friend at Hotmail. It started yesterday, June 16th. This is after years and years of our sending emails back and forth via the same two accounts. And now suddenly anything I send her is returned to me with the error code. I had to forward the returned email to my gmail account, which I seldom use because I just don't like it, and then send it from there to her, at Hotmail. That worked. So irritating. D. Clark

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  2. Anonymous
    2025-06-06T01:03:21+00:00

    thanks. Thought as much. Let's hope Verizon can respond quickly in making the change and not have to spend endless days "looking into it".

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  3. Anonymous
    2025-06-05T23:30:58+00:00

    Started having the same problem a few days ago. Also when sending text messages to my Hotmail account using Verizon as my carrier. Have not contacted Verizon about it but a Microsoft technician tried correcting the situation form their end but without success so far.

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  4. Anonymous
    2025-06-03T20:55:56+00:00

    I am having the same issues. It was working just fine yesterday and today emails sent from my Verizon cell phone to Hotmail outlook email are being rejected. Tried Verizon customer service and they have no answers. Seems to be an outlook problem. Any suggestions. Thank you.

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  5. EmilyS726 235.7K Reputation points Independent Advisor
    2025-05-29T15:56:51+00:00

    Hello,

    Microsoft is rejecting your emails because the sender's domain fails DKIM authentication, even though SPF and DMARC pass. This breaks their new stricter anti-spoofing requirements.

    You will need to review and configure your DKIM correct for your sender domain: engenhariadocorpo.com.br

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