I will pass this on to the programmers but we have discussed this several times and the only thing that will solve this one day a week issue is to have a whole different mail server dedicated to the newsletter and one dedicated to the ebots.
The newsletter goes out to over 135,000 subscribers and so it does cause a delay while its sending but its certainly a lot shorter delay these days than it use to be...We did do something things with the current mail server to help the delay not be so long but yes there is still a small delay on this one day a week.