My outgoing email has been blocked (spam) and I don't have admin inlog data

Question

My outgoing email has been blocked (spam) and I don't have admin inlog data

René 0

My outgoing email has been blocked because of, wrongfully, suspision of spam. My host, Yourhosting, can't help because they don't have acces to my admin account and I dont have this information neither. So help me with a verification procedure and unblock my outgoing email: [Moderator note: personal info removed]

2 answers

Your answer

Answer 1

Michelle-N 12,850 Microsoft External Staff Moderator

Please note that Q&A forum is a public platform, and moderators will modify the question to hide personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.

Hi @René

Thank you for posting your question in the Microsoft Q&A forum.

Based on what you described, I understand that your outgoing email has been blocked due to a suspected spam issue, which you believe is incorrect. Your hosting provider cannot assist because they do not have access to your admin account, and you also do not have those admin credentials.

To help you better, could you please share the NDR (Non-Delivery Report) error message you are receiving?

In the meantime, you may also review Microsoft’s official documentation regarding blocked outgoing mail and error codes to identify the specific cause.

Email non-delivery reports and SMTP errors in Exchange Online

Additionally, based on similar reported cases, some users have experienced outgoing messages being blocked with an error such as:

550 5.7.520 – Message blocked

This sometimes happens when emails contain attachments that trigger filtering mechanisms.

As a temporary workaround, instead of attaching the file directly, you can share it via OneDrive:

Create or reply to an email > Select Attach > If the file is already stored in OneDrive, choose it from there > If not, select Upload and share, upload the file, and then insert it as a shared link > Alternatively, you can copy the sharing link directly from OneDrive and paste it into your message.

This method avoids sending the file as a direct attachment and may bypass attachment-based filtering.

Please share the exact error message so I can guide you more precisely.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

René 0 Reputation points

2026-02-12T13:15:17.51+00:00

Here is the report.

There is one solution, you call me and do a verification procedure. Everything else won't work.

This message couldn't be delivered because the sending email address was not recognized as a valid sender. The most common reason for this error is that the email address is, or was, suspected of sending spam. Contact the organization's email admin for help and give them this error message.

Diagnostic information for administrators:

Generating server: PAWPR10MB8067.EURPRD10.PROD.OUTLOOK.COM
Michelle-N 12,850 Reputation points Microsoft External Staff Moderator

2026-02-12T13:28:42.6033333+00:00

Hi @René

Thank you for your updates. Based on the information you provided, I have found the relevant instructions to address this issue. However, this process requires admin permissions, so please try to contact your IT administrator to proceed.

If your organization uses Microsoft Defender for Office 365, the email admin can check whether your account has been flagged in the Outbound Spam section of the Microsoft 365 Security & Compliance Center.

Sign in to the Microsoft 365 Defender portal using an admin account: https://security.microsoft.com > In the left navigation, go to: Email & Collaboration > Review > Quarantine > Use filters to search for the affected user’s email address.

If messages are quarantined:

-Review the reason (for example: spam or malware).

-Select the message and choose Release message, if appropriate.

-Optionally, report the message as a false positive to Microsoft.

Additionally, it is possible that the account was flagged by Microsoft’s anti‑spam system and added to the Restricted Users list, which would block all outbound email.

In that case, the admin can review and unblock the account by following this Microsoft article: Remove blocked users from the Restricted entities page – Microsoft Defender for Office 365

I hope this helps.
René 0 Reputation points

2026-02-12T13:31:53.85+00:00

Very kind, but I am the IT administrator and we don't have the admin info, as it is from 20 years ago
Michelle-N 12,850 Reputation points Microsoft External Staff Moderator

2026-02-12T13:44:55.7333333+00:00

Hi @René

Thank you for the update. Just to confirm, you are the only admin, and you cannot access your tenant, right?

In other words, can you sign in to admin.microsoft.com? Please let me know and I’ll stay here and continue to support you.
René 0 Reputation points

2026-02-12T13:51:12.11+00:00

yes I am the only admin (and user) and I cannot access the tenant. The tenantname I received from my hosting company. I can sign in but not with the right permission to do what seems to be required.
Michelle-N 12,850 Reputation points Microsoft External Staff Moderator

2026-02-12T14:01:36.6366667+00:00

Hi @René

Thanks for your update. Based on your description, it appears that your Microsoft 365 tenant is managed by your hosting company. In that case, you may find the following article helpful: “How do I find my Microsoft 365 admin?” – Microsoft Support.

Please share this instructions with your IT administrator as an initial reference and they can help you to remove you from restricted users list. Thank you.
René 0 Reputation points

2026-02-12T14:08:34.0933333+00:00

The GDAP has expired (Granular Delegated Admin Privileges). So it is not possible for them to access the Microsoft environment for me. So they can't do anything. Only Microsoft can, but after more than a full day I have not been able to get to talk to someone.
Michelle-N 12,850 Reputation points Microsoft External Staff Moderator

2026-02-12T14:20:06.39+00:00
Hi @René

Thank you for your update.

I understand the situation now. At the moment, since I am only a moderator and do not have access to the system, I’m unable to make any changes directly. Therefore, I will guide you to contact the Data Protection team, who will be able to provide proper assistance and help you regain access to your tenant.

In this situation, there are two official paths you can take to regain access to the tenant:

Please visit the following page and contact Microsoft using the phone number listed here: Customer service phone numbers – Microsoft Support

From my experience, you may need to get past the initial AI system in order to reach a live support agent. You can refer to the guide below for tips on how to get through more easily.

2.If method 1 is not working, please follow this link to create a trial tenant: https://www.microsoft.com/en-us/microsoft-365/business/microsoft-365-business-basic?msockid=3eb6980b5c6860e63a588d0c5d1761d6 - after that you will be able to access to Microsoft 365 Admin Center to raise the ticket

Assuming that you have already created an account after registering a free trial and you can go to Microsoft 365 admin center and click "Help & support" icon to raise your ticket. The agent will be able to create a ticket for you under the affected tenant and then transfer this ticket to Data Protection team who could help you to regain access. Please mention that you are raising ticket on behalf of the affected tenant that you do not have access to. The support team will help you to create ticket on the affected tenant then later on the Microsoft Data Protection team will assist you.

Note: This process will take more time than usual (7-14 working days) for your account to get access again as Data Protection is always overwhelmed with the number of tickets. As I am forum moderator, I do not have access to Microsoft internal system to assist or push this process to be quicker.

Please note that this trial is available in 30 days. Before the expiration date, please go to Microsoft 365 Admin Center and proceed to cancel the trial to prevent further charges as this trial tenant is used for ticket creation. Instruction: Cancel your Microsoft business subscription in the Microsoft 365 admin center | Microsoft Learn

I hope my information is helpful. Please give me any updates once you get this resolved.
René 0 Reputation points

2026-02-12T14:51:01.6666667+00:00

The bot in the first option says it is not possible to connect now. For the second option I need to create a paid new account. Can't you have someone call me?
Michelle-N 12,850 Reputation points Microsoft External Staff Moderator

2026-02-12T14:55:31.6233333+00:00

Hi @René

Please note that this forum is not Microsoft Support; it is a community where users help one another. Forum members do not have access to your account, so they can only provide recommendations based on their own experience.

As a forum moderator, my role is to help guide discussions and share insights based on Microsoft documentation and community knowledge. I don’t have direct access to your account, tenant, or billing information, but I’ll do my best to support you with practical guidance and point you to the appropriate resources.

Therefore, if you are unable to contact Microsoft Support by phone, you may consider creating a trial tenant to raise a support ticket. As mentioned earlier, this trial is available for 30 days. Before the expiration date, please make sure to go to the Microsoft 365 Admin Center and cancel the trial to avoid any charges, as this trial tenant is only used for ticket creation.

Instructions: Cancel your Microsoft business subscription in the Microsoft 365 admin center | Microsoft Learn

Thank you for your understanding.
René 0 Reputation points

2026-02-12T15:08:18.4033333+00:00

for the trial I need to give an email address. Do I have to use the one which is not working with outgonung mails?
René 0 Reputation points

2026-02-12T15:21:17.12+00:00

+out going
Michelle-N 12,850 Reputation points Microsoft External Staff Moderator

2026-02-13T09:45:40.2166667+00:00

Hi @René

Thanks for the update. To use the trial, you need to use a completely new email address that has not been associated with any tenant before. After raising a ticket with the Data Protection team, you will then provide the details of the tenant where you're experiencing the issue.

Thank you for your patience.

Answer 2

If your outgoing email has been blocked due to spam suspicion, you can take the following steps to request unblocking:

Use the Delist Portal: Microsoft provides a self-service portal for external senders to request removal from the blocked senders list. You can access this portal at sender.office.com. Follow the instructions provided there to submit your request.
Contact Microsoft Support: If you are unable to resolve the issue through the delist portal, you may need to contact Microsoft Support directly. Since you do not have admin access, you might need to ask someone who has admin privileges to assist you in opening a support ticket.
Check Non-Delivery Reports (NDR): If you receive any non-delivery reports when sending emails, they often contain information about why your email was blocked. This can provide insights into the specific issue.
Follow Best Practices: Ensure that your email practices comply with Microsoft’s guidelines to avoid future blocks. This includes avoiding spammy content and ensuring proper email authentication settings.
Wait for Response: After submitting your request through the delist portal or contacting support, be patient as it may take some time for Microsoft to respond and resolve the issue.

If you follow these steps, you should be able to address the blockage of your outgoing email effectively.

References:

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My outgoing email has been blocked (spam) and I don't have admin inlog data

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