RSS Feed/News Banning Gmail aliases (+) sign

[ENXF NET]

I wonder if this is a valid way to ban Gmail aliases? They work by adding + to existing Gmail.
Like [email protected] will send email to [email protected] basically they can create infinite aliases off 1 Gmail.
I thought of adding this to banned emails:
Code:

*+*@gmail.com
*+*@googlemail.com

Would that rule work for it?

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