No privacy protection if you are using Gmail account

Gmail scans content of my incoming emails. I can not do anything to stop such privacy intrusion.

----- Transcript of session follows ----- 
... while talking to gmail-smtp-in.l.google.com.: 
>>> DATA 
<<< 550-5.7.1 [2401:300:0:1::8080 7] Our system has detected that this message
<<< 550-5.7.1 is likely unsolicited mail. To reduce the amount of spam sent to
<<< 550-5.7.1 Gmail, this message has been blocked. Please visit
<<< 550-5.7.1 http://support.google.com/mail/bin/answer.py?hl=en&answer=188131 for
<<< 550 5.7.1 more information. ps11si2916950pab.141 - gsmtp
554 5.0.0 Service unavailable