Follow Up Boss didn't accept Trevy's connection
What to do when Trevy says Follow Up Boss no longer accepts its connection, and how to reconnect.
Updated October 20, 2026
You may see this message on the Send through Follow Up Boss card, at the top of the Emails page, when you click Check setup or switch sending on:
"Follow Up Boss didn't accept Trevy's connection. Connect it again in the General tab."
What it means
Follow Up Boss turned down the connection Trevy has on file. Trevy still lists FUB as connected, but FUB no longer recognizes that connection. This happens when:
- the API key you connected with no longer works in FUB, or
- the approval you gave with Sign in with Follow Up Boss was removed or has expired.
What happens until you fix it
While FUB refuses the connection, Trevy can't send through it. Follow-up emails that come due wait instead of being dropped, and carry on once the connection works again.
How to reconnect
- Go to Settings → General.
- Under Connections, click the button next to Follow Up Boss. It reads Reconnect, or Update API Key if your Trevy connects with API keys.
- Click Sign in with Follow Up Boss and approve Trevy. Or click Use an API key instead and paste a working key from Admin → API in FUB.
- Go to the Emails page and click Check setup on the Send through Follow Up Boss card. When it says "Setup checks out.", Trevy can send again.
Reconnect as the Follow Up Boss account owner, and to the same FUB account your team uses. Trevy needs the owner to add its custom fields.
Reconnecting doesn't restart or extend your free trial. The trial starts once, however many times FUB is connected again.
If the sign-in itself shows an error, see Follow Up Boss won't connect.
"This Follow Up Boss key reaches a different FUB account"
The full message is "This Follow Up Boss key reaches a different FUB account than the one Trevy has on record. Reconnect Follow Up Boss in the General tab."
It means the connection Trevy holds now reaches another FUB account than the one it was set up with. Reconnect from Settings → General as above, signing in to (or using a key from) your team's FUB account, then click Check setup again.
Still stuck
If Check setup says "Couldn't reach Follow Up Boss to check the setup. Try again in a minute.", FUB didn't answer at all. That's different from FUB refusing the connection: wait a minute and try again. If reconnecting doesn't clear the message, email support@trevy.io.
For the other problems the card can list, see fixing problems with sending through Follow Up Boss.