Your message couldn't be delivered because it's suspected of being spam

Carlos Espinola 30 Reputation points
2024-06-06T23:44:48.45+00:00

I sent an email from my O365 email acount and received an rejected inform from destinatary email server

This is the message

Your message couldn't be delivered because it's suspected of being spam. For best practices when sending email, refer to the guidelines found here: https://aka.ms/EmailingBestPractices.

gorilla.smart-hosts.net produjo este error: Decision Engine classified the mail item was rejected because of IP Block (from outbound normal IP pools) -> 550 "JunkMail rejected - mail-bn7nam10on2092.outbound.protection.outlook.com;(NAM10-BN7-obe.outbound.protection.outlook.com) [40.107.92.92]:27296 is in;an RBL: Blocked - see https://www.spamcop.net/bl.shtml?40.107.92.92"

that ip below to Microsoft I tHink, please help! sorry my english

Microsoft Exchange Online
0 comments
Accepted answer
  1. Jake Zhang-MSFT 2,635 Reputation points Microsoft Vendor
    2024-06-07T06:07:17.8233333+00:00

    Hello @Carlos Espinola,

    Welcome to the Microsoft forum for technical support.

    Based on your description, it seems that the email you sent was rejected by the recipient's email server because it was marked as spam, probably due to the IP address being on the Real-time Blacklist (RBL). The message you received indicates that the IP address (40.107.92.92) is listed on SpamCop's block list.

    I suggest that you can follow the steps below to resolve the issue:

    1. Visit the link provided in the error message (https://www.spamcop.net/bl.shtml?40.107.92.92) to see why the IP was blacklisted. This can help you understand the reasons behind the rejection.
    2. Go to the link referenced by Best Practices (https://aka.ms/EmailingBestPractices) and make sure your emails meet those guidelines. This includes not sending to too many recipients at once, making sure your content does not contain spam characteristics, and that you have set up proper authentication (SPF, DKIM, and DMARC).
    3. If your settings are all correct, you can fill in the relevant information at this link: https://olcsupport.office.com to seek to remove your IP address from the block list.

    Please feel free to contact me if you have any queries.

    Best,

    Jake Zhang

0 additional answers

Sort by: Most helpful
Most helpful Newest Oldest