It wouldn't be an overage, if you market it as a pay-per-GB e-mail provider with no limits (but the first 1 GB is free) that would be cool.
As for managing spammers, just require some sort of ID verification? Or set the price point high enough that spammers wouldn't be interested?
$1.50/month for personal or $16/month for business is insanely cheap, I pay a lot more than that to Google. If you're too inexpensive, spammers will be attracted to your pricing.
Real businesses would have no problem paying upwards of $100/month, to be honest.
Although you're right about successful businesses being able to pay $100+ a month, we are trying to give good email to those that are trying to start their businesses without killing them with costs. Cool idea though about the pay-per-GB. I'll think about that.
As for managing spammers, just require some sort of ID verification? Or set the price point high enough that spammers wouldn't be interested?
$1.50/month for personal or $16/month for business is insanely cheap, I pay a lot more than that to Google. If you're too inexpensive, spammers will be attracted to your pricing.
Real businesses would have no problem paying upwards of $100/month, to be honest.