Outlook
A family of Microsoft email and calendar products.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 40%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EEA%3C/text%3E%3C/svg%3E)
Muchos usuarios estamos teniendo el mismo problema desde el día de hoy. No encontré ninguna solución en internet aún.
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(112.00000000000001, 98%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETL%3C/text%3E%3C/svg%3E)
Tyler Lam
0
Reputation points
I ran into this issue today. Someone please help!!
This was a test mail I sent to myself.
Diagnostic information for administrators:
Generating server: ME4P282MB1047.AUSP282.PROD.OUTLOOK.COM
xxxx@hotmail.com
Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(121.6, 11%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECM%3C/text%3E%3C/svg%3E)
ChristyZhang-MSFT 22,336 Reputation points Microsoft Vendor2023-11-10T01:56:27.65+00:00 Hi @Tyler Lam ，
Just checking in to see if above information was helpful. If it is useful, would you mind marking the helpful post as an answer? Which would benefit others who also has similar issues in forum.
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2 answers
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(198.4, 10%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESM%3C/text%3E%3C/svg%3E)
SokiGuo-MSFT 25,751 Reputation points Microsoft Vendor2023-11-07T08:38:59.2633333+00:00 Hi @Tyler Lam ，
Welcome to our forum!
Did you try to send emails with PDF attachments?
If so, I'm afraid this is related to a temporary backend issue. Microsoft has taken note of it and is looking into it. Sorry for the inconvenience, please be patient and wait for this issue to be fixed and i will update here as soon as possible. Thank you for your understanding and support!
In addition, I found a thread mentioned that it's useful to change email format, as shown in the below image. It's suggested that you could try the workaround.
(In order to avoid the privacy leakage, I have hidden your emails address. Please remember to hide your personal information before your post.)
Hope to help you!
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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ChristyZhang-MSFT 22,336 Reputation points Microsoft Vendor
2023-11-08T02:07:50.8766667+00:00 Hi @Tyler Lam ，
We find that the issue is restored, it's suggested that you could check if the issue persists.
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