We send out a newsletter using the XF bulk mail system, however since upgrading the XF 1.5 it has become painfully slow. From some helpful advice on the forums, I found out this was because XF 1.5 handles emails by adding them to a defer queue. Is there a way to bypass this? On XF 1.4 we can send 5k e-mails in less than a minute. On XF 1.5 it takes closer to an hour.