> On the other hand, if a legitimate email from a future friend or a potential business associate were accidentally blocked, the lost opportunity cost is severa

> On the other hand, if a legitimate email from a future friend or a potential business associate were accidentally blocked, the lost opportunity cost is several magnitudes higher. To some extent, this also applies to legitimate business mails going to Spam. That was a big reason for me to switch away from Outlook to a provider where I could configure the spam filter to the equivalent of "Viagra scams etc".