One problem with so many emails is that they're much faster and easier to write than to thoughtfully respond to. Something like "how much would a clone of ebay

One problem with so many emails is that they're much faster and easier to write than to thoughtfully respond to. Something like "how much would a clone of ebay.com cost?" takes 5 seconds to write by an eternity to answer in any thoughtful way (excluding true but glib responses like "more than you can afford"). For message-delivery emails, a "Please let me know if you've received this" goes a long way, as does following up with another medium. For "quick question" emails, make sure they're as quick to answer as they are to ask. You don't have to go all the way to a multiple-choice form, but aim for mostly yes-or-no or which-of-the-above questions.