Bulk email sending throttling is nowadays a standard feature for any bulk email delivery platform. In Gumbamail almost instantly after starting any bulk campaign I get automated message that my campaign was stopped to prevent my server from being blacklisted because of a number of bounces (even when I was using a double verified existing email addresses lists). This makes Gumbamail practically useless for any bulk campaign with over 1000 recipients in any List. When do you have plans to introduce throttling to prevent this and enable using larger lists which many of email marketers use?