Probably. I just got it, too, but was allowed to post on the second try.
Edit: Actually, the post went through the first time. If you get the "e-mail error" thing, open the forum category in another window or tab, and you'll likely see that your reply has been appended to the thread.
Who knows? All these errors may turn out to be the result of some minor setting that the server host changed but forgot to mention. I have one script on my own site that I keep needing to "fix" for that very reason.
(Note: By "fix" I mean "change a setting in the script to un-do whatever change the host made but didn't tell me about".)
Eliz.