corad, 4am-6am is when we perform our daily maintenance. The site shouldn't be very slow though. Please let us know more about the slowdown that you experience.

On the issue of delayed mails, I looked at the 304 mails delivered to you in the past 7 days. 97% were delivered under a minute, 2% under 3 hours, and 1% under 6 hours. Those 3% usually happens due to high load spikes or the intermittent network outages we've been facing these past 2 weeks.