Briefly: If people don't reply to your email, it almost certainly didn't get lost. It's either you fault or theirs — not the internet's.
Claims Of 'Lost Email' Are So Dumb
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Five years ago, I threw away a hard drive. An utterly generic 250GB portable hard drive, already a few years old, with a couple of dings and scratches in its shell and with the beginnings of an audible click that would have eventually killed it. It had a data file containing 1400 Bitcoin on it. No big deal, at the time. Today, those few kilobytes are worth more than four million dollars.
You can't make this s*^& up. Or can you?