They can change their address to the “new” address. If they want some Discourse mail to go to one address and other discourse mail to go to another address, then they can create a filter and forward the notifications to the other account.
They can change their address to the “new” address. If they want some Discourse mail to go to one address and other discourse mail to go to another address, then they can create a filter and forward the notifications to the other account.