翻译：我的newsletter功能早就停用了 马上给分

the function of my newsletter had stopped for use for a long time

I have discontinued the Newsletter feature for a long time.

I have stopped the newsletter function

the function of my newsletter is out of commission long since.

out of commission = 停止营业/运作
long since = 老早就....

the function of my newsletter had been out-of-commission long ago