Same problem still. I have yet to hear anything back now from support for more then 14 or so hours. I had to proceed with our daily send and ran into the same issue.
I have little choice now other then to search out a new hosting service. We are on the semi-dedicated plan which is one where I thought would be more stable. This recurring problem has now had an impact on our business. We have let our customers down and I need to resolve this situation immediately.
Our script I can assure you is not the problem. It has run flawlessly since October except for one time in early January in which you were able to fix the mail server and since then, until this week, has once again run flawlessly. 4 days without being able to send out one of the most important features on our web site is causing too much frustration.