sending text messages, old gmail email addresses show up in the "to" section

[lgbalfa]

when i send a text message and i go to the address bar and start typing in the name for the recipient, it brings up a lot of old email addresses that i previously emailed from my gmail account even if it is just one time.

is there a way that i can prevent this?

i would just like the contacts from "backup assistant plus" to show up.

thanks