That is just asinine. What’s the point of responding to a 9 month old email about VOIP service?
So many companies have wrong-headed thinking about email. Because they’ve gotten accustomed to call centers, they figure that email is an additional task. It’s not. It’s an alternate way of handling the same transaction. Some types of transactions (e.g. orders) need to be done securely, and thus are done by phone or customer self-service, but a lot of other issues - customer service, presales, technical support - are much easier to handle by email. Would you rather have an agent wait for several minutes while a customer gathers needed information, or just send the information that’s needed in an email and then respond once we have it? Would you rather a customer hem and haw in your agent’s ear, or have the agent be able to quickly read an email and pick out the important information? An agent can take far more emails in a day than calls.
Answering emails promptly is of course the key to this. Anything beyond 24-48 hours is pointless; customers are going to call to get it resolved, or give up.
If you really don’t want emails, just direct people to call. Don’t make them wait in endless queues and waste employee time handling long outdated inquiries.