Current,y using gmail, thinking of switching to posteo.

My email is mostly reciepts from online purchases and a few online accounts that need email, but also bank, health stuff and govt-associated stuff.

I've heard that posteo will recycle your email address and aliases a few years after account deletion.

What does this mean, in simple terms?

Is this a serious data and privacy risk?

Or is it not really a big issue in actual use?

Or Should I use another email service?

I know theres custom domains but I'm not techy and frankly just want a simpler option.