Notification being sent from wrong email.

Hello all,

I am setting up a website with a membership program. When someone signs up it sends an email thanking them and with a confirmation. Only problem is that its not sending it from the right email. For example instead of sending it from [email protected] its sending it from [email protected]. How does one fix this? I’ve tried installing plugins and changed all the email addresses I could find in wordpress with no success. Thank you!