Outbound mail comes with heavy problems with abuse. The government can't easily filter it out either (literally "free speech").

"limited" might mean 50-100 emails per day or even less

Does anyone send 50+ personal emails a day? If it takes 5 minutes to write each one, that's over 4 hours doing nothing but composing emails!?

Maybe if you're sending party invitations or something? But that's got to be once or twice a year, surely.

I didn't say personal, I said between national email addresses, which might include your government services and institutions