Spam that went pass filter?

This is my first time receiving spam that looks so clean that went past any spam filter.

from: PayPal service@support.com via sendgrid.net
reply-to: PayPal service@support.com

I did have a filter to mark it as a folder in gmail, but it didn’t look one bit suspicious at all. A link in there redirects me to paydotcom.com and the original link is sendgrid.net

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