Question: When leaving a voicemail message on a cold-call, is it ok to tell them that you will contact them via email? It’s often more convenient for them to respond to an email.Response: No, this is a waste of your energy. If you’re going to leave a voicemail, don’t say you’re going to send them something immediately. Rather, wait a few days before sending one (assuming they have not called you back). It is good to use multiple tactics to cold-call, but stagger them out by a few days to create an enduring impact.