Does this message mean I was marked as spam?

Your message to name@email.com has been blocked. See technical details below for more information.

The response from the remote server was:

550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [BN8NAM11FT013.eop-nam11.prod.protection.outlook.com]

And there was a red traffic light below this. What does this indicate exactly?

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source https://www.reddit.com/r/Emailmarketing/comments/k04t5a/does_this_message_mean_i_was_marked_as_spam/