How do i increase the outgoing email limit?

How do i increase the outgoing email limit?

Hello


I noticed that after sending 50 emails, I get


"Mail rate exceeded limit" and have to manually unblock.

That limit is really low. How do I increase it?
By the way, is there a daily limit too? or per hour?
How do you count the "hours" from 6:00 to 7:00 is 1 hour or how?



How do i increase the outgoing email per  limit? Thanks!