In common English, "pace" means the rate of speed and is a noun. It's uncommonly used as preposition (in your example), where it takes the modern Italian pronunciation: pah-chay. It literally means "peace". It means you politely disagree with the other person. "Sorry, Bill! Take a chill pill." You really wouldn't use it unless you were speaking in a purely literary or oratory sense.

HELLO, How are you today.my name is penda ,i saw your profile today and became intrested in you,i will also like to know you more,and i want you to send an email to my email address so i can give you my picture for you to know whom i am. Here is my email address ([email protected]) I believe we can move from here! I am waiting for your mail to my email address above.. (Remeber the distance or colour does not matter but love matters alot in life) yours in love, Penda.