i want to know …i have sent 4000 emails with my own mail sender and it has only sent 500 emails on the 4000…i want to know if my $5 plan on DIGITAL OCEAN droplet with 4GB is too low and limit my sending email list to send 4000 emails (data) or does i need to extend my plan on Digital ocean to be able to send more email ? thanks for your quick respons.