<div>
Your emails can be detected as spam. Maybe your domain is blacklisted.<br />
You can check the status of your domain here: <a href="https://mxtoolbox.com/blacklists.aspx" rel="ugc">https://mxtoolbox.com/blacklists.aspx</a><br />
<br />
Do you use Exchange? If this happens to one user, maybe the user is blocked due to some messages considered as spam, however, you can unblock the user: Exchange Admin Center -&gt; Protection &gt;&nbsp;Action Center -&gt; search for the user -&gt; Unblock Account
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Your emails can be detected as spam. Maybe your domain is blacklisted.
You can check the status of your domain here: https://mxtoolbox.com/blacklists.aspx [https://mxtoolbox.com/blacklists.aspx]

Do you use Exchange? If this happens to one user, maybe the user is blocked due to some messages considered as spam, however, you can unblock the user: Exchange Admin Center -> Protection > Action Center -> search for the user -> Unblock Account

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Funny thing is, that the domain is outlook.dk <br />
The Danish local of outlook owned by Microsoft.<br />
It's not on the blacklist.
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Funny thing is, that the domain is outlook.dk
The Danish local of outlook owned by Microsoft.
It's not on the blacklist.

<div>
I have re-setup the account<br />
<br />
Set up the account on a different pc in the same house. <br />
<br />
Set up the account on a different pc in another house.<br />
<br />
Same result.
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I have re-setup the account

Set up the account on a different pc in the same house.

Set up the account on a different pc in another house.

Same result.

Virksomhedsejer

Rene Christensen

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<div class="content wysiwyg-content">
I have an outlook.dk mail attached to a Outlook 2016.<br />
<br />
It has been working until today, where sending mails suddently result in a returned message:<br />
Remote Server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4567)'<br />
<br />
It happens on all outgoing mails regarding receiver.<br />
<br />
We can receive all mails on the Outlook 2016.<br />
<br />
Sending from OWA works as intended.<br />
<br />
Any ideas?
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</div>


I have an outlook.dk mail attached to a Outlook 2016.

It has been working until today, where sending mails suddently result in a returned message:
Remote Server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4567)'

It happens on all outgoing mails regarding receiver.

We can receive all mails on the Outlook 2016.

Sending from OWA works as intended.

Any ideas?

Outlook mail can send from OWA but not Outlook 2016

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.