Hello all,
I have looked everywhere to find a solution to this problem, which we also suddenly started to suffer from!
I tried all the start/stop/restart ie. 'service qmail start'. qmail started OK, but still nothing. 'service qmail status' resulted in showing qmail was up, but worryingly it said 'normally down'... I even flushed the qmail-queue, nothing. I tried to start smtpfwdd, but I could not find it (yeah I know, dummy...)
I scanned our server and found Port 25-SMTP was blocked, when it was open when we were receiving email...
All looked OK, except it was not and we were getting the error message in the logs.
In a last ditch effort, I upgraded 5.1.2 with Update 3. I felt this would rewrite some corrupt qmail file somewhere which was possibly the cause of this.
Well, the email has started working again and we are not getting the error message anymore.
It seems to me that there is a corrupt file somewhere, which is causing qmail not to start properly, hence possibly the message. I do not know the exact cause of this, and from what I have seen on the many Web sites I looked at, neither does anybody else! Even Mitel appear to have no idea too, judging by the many posts and the small amount of help from the usually attendant people at Mitel.
I was wondering if re-applying the qmail RPM (if there is such a thing), would do the same job of re-writing the corrupt file/s? I do not know how to do this, but some other people could try this maybe?
My suggestion is to try everything! Sorry I could not be of any definitive help.