A quick maintenance is being carried out for mail4 to resolve slowness of webmail.
Problem is caused by a client having approximately 50,000 suscribers in a mailing list. This is certainely Server Abuse and we are going to take care of it right away.
Mail4 is up for a while now, but being still monitored. The queue is clearing up at the moment and it should be back to normal in next 20 mins.
Queue is back to normail now.