I have been using gossamer mail 3.01 for many years with essentially no issues. We are using this internally for our company with only a handful of users, so the server load is very low. About 2 days ago our outgoing mail essentially stopped working. Either the mail does not get sent-out at all, or there is a very long delay before sending (12+ hours for example). We are using qmail as our mail server. We have not changed any configuration of either qmail or gossamer mail.

I am at a loss as to what could be causing this problem so any suggestions as to where to start looking would be very much appreciated.

Thank you.