OVH has a mail redirection service that fails quite badly. It’s a little bit slower, or at least it’s always the slowest point of the mail transmission chain. But sometimes it’s REALLY slow. Like 10 hours slow. An other interesting point is that their redirection server time is totally out of sync. This is a little problem for me as I use mails intensively. I had setup some postfix/mysql redirection before and I think I will have to come back to that.