Outlook problem

Question

Some times my email will be rejected sent by outlook.

Pls help me to see why.

My email is [Moderator note: PII removed] @outlook.com

Thank you very much!

Answer 1

Hi Xie Karma

Please note that our forum is a public platform, and we will modify your question to hide your 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.  

Thanks for posting. I understand how frustrating it can be when emails are occasionally rejected, especially when it’s not clear why. I’ll help narrow this down.

To help identify the cause, please check the points below and let me know the results:

1, Check the bounce‑back message from Outlook.com

When a message is rejected, Outlook.com usually sends an automatic reply (“Delivery Status Notification”).

• Look for error codes like “550”, “554”, or “Blocked” in that message
• These codes indicate whether the rejection is due to spam filtering, recipient server rules, or sending limits

2, Check Outlook.com sending limits

If many emails are sent in a short time or similar content is repeated, Outlook.com may temporarily block sending.

Reference: Sending limits in Outlook.com

3, Remove links or attachments and test again

As a quick test, send a plain‑text email with no links or attachments. If that succeeds, the rejection is likely content‑based filtering by the recipient’s mail system.

Please feel free to let me know how it goes. Thank you for your time and understanding.