it is important to save all attachments with each email (regardless of whether the attachment as been saved before) so that we have an accurate record of the email and what attachments it had. Therefore we would request you make a change to appended the email hashcode to attachments so they always have a unique file name. Without this we get an error saying the file name already exists. I understand you don’t want to change the code for existing customer so we would be happy to accept this as a setting we could turn on.