If by error you mean you get back a delivery error message, that kind of message can be only managed with our bounce addon or if you use a delivery service, with an integration addon for that delivery service. Again, if you use a delivery service, that can provide a list of bounced addresses that you can import as bounced using the free advanced import addon.
Those errors are not triggered while we’re sending, but later with that bounce message (more correctly a DSN message).
S.