Are you looking for FREE Spanish Classes? / ¿Buscas clases de español GRATUITAS?
Tap the hamburger menu (three stacked lines) in the top left.
Tap Settings and scroll down to Filters.
Select the email account you want to add a filter for.
Tap the + icon to add a new filter.
Name it anything you want (such as “Whitelist”)
Add the @ihmexico.com
Click the ✓ icon in the top right to save the filter.
Adapted from: https://sumo.com/stories/whitelist