Emailing in batch

[eluser]stef25[/eluser]
Is there any way to find out if a batch emailing has been completed? My app will email 100's of people say in batches of 50. For each email sent out there is an accompanying INSERT statement to the DB. If some batches don't get sent out then those INSERTs should not happen or be deleted.

Is there any way I can check this, apart from the return value of $this->email->send() ?