Message identified as SPAM "Remote server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)'" Reported

Wenny Song 10 Reputation points

cannot sent email by using hotmail

A family of Microsoft email and calendar products.
3,271 questions
Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
5,014 questions
{count} votes

3 answers

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  1. MBIT Castelo Branco 0 Reputation points

    Same problem here.

    0 comments No comments

  2. EP Aberturas 5 Reputation points

    I have the same problem, I haven't found a solution yet.

    0 comments No comments

  3. SokiGuo-MSFT 24,946 Reputation points Microsoft Vendor

    Hi @Wenny Song

    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.

    User's image

    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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