I'll move this so Krydos looks at it for you. I don't think the throttling should impact a remote mail server. Gmail does tend to have issues with our service though (especially SMTP connections to it...)
Your mail was throttled to 1 email per hour (24 max emails per day.) The throttle has been removed. If you would like to be able to send more than 50 emails per day (which is what triggered the throttling in the first place) you'll need to provide some additional information. Let us know if you're interested in raising the limit.