Well, I suggest you "brace yourself", because that is exactly what has happened with at least one of my domians (I'm afraid to investigate further with my clients, especially after yesterday).
The dreamhoststatus.com page has been woefully behind the curve on this, and I've received automated messages that the "system wide" problem is resolved, but no love here.
From the last dreamhoststatus.com posting:
Upon checking it later, and finding it still broken, I reported it as a "system wide" again, and it was verified, but no status since then.
For this domain, I was on swarthy (though last time I noticed it, it had changed and had a subdomain attached, looks like a new load balancing configuration).
A few hours of problems, it happens! This one, however, is going on un-abated for two full business days for various of my clients, and it is really starting to hurt. The worse part for me, today, was no indication of a problem - No bounce, no authentication errors, no failures of any kind reported, just no mail delivered. If I had not become suspicious that I had not heard back from a client on an issue I knew he would find important, and started testing things myself, I would have never known, The status page certianly gave no usable warning, rather indicating "we think we got it fixed".
I hesitate to make the support que grow any larger (over 750 last time I checked), but I no longer trust the status page, or the "outage status" announcements, and suggest doing your own tests to ascertain whether or not it is "resolved" for you.
I suggest you go back through your IMAP/POP clilent's "sent" mail folder and resend them all (for me, it was from about 07:30 PDT) via a known good SMTP server, if there was anythiong important in there (it only took me about an hour!)