I've recently become aware that GMail is silently failing to receive emails from certain parties. Said emails appear "sent" from the sender's perspective, but never show up in my inbox, archive, or spam folder. Worse, all parties involved are work/business related. I did not make any account changes that could cause this behavior, and searches have turned up numerous similar stories from other GMail users (and no workarounds). I also have reason to believe that emails I send from GMail are not always received, or may not be received in a timely fashion. This is obviously quite unacceptable for business use. What alternatives are available from other companies, that can actually be relied upon? I'm open to paid services, as long as they're not outrageously expensive. Seriously, anything to actually receive critical emails, and receive them the same day they were sent.