This should not be days though. These email recipients are the same people that welcome email as a form of communication. These people freely give their email address next to their name or company. Honestly, if you try to phone a company or an individual, you may easily be pawned off to a holding area or the famous voice mail. Clearly, email allows for negotiation of time.
Email is sent and delivered within minutes, making it a powerful tool that can be utilized.
If corporate email is not replied to, email might as well take hours to be delivered. We live in a world where we can implement same day delivery, which is faster than email from many corporations. Yes, I have experienced these email issues. But, I am not alone as I have seen so many others with the same problems. Some corporate employee simply decided to throw it out, to brush it off into the trash.