This morning I was able to reply to a couple of posts directly from my E-Mail account. But later I tried and the replies were rejected. I've heard from another community expert that he was seeing rejected replies as well.
In case it will help, below is a copy/paste of one rejection.
=====> Snip <=====
This is the mail system at host mail.sgaur.hosted.jivesoftware.com.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to <postmaster>
If you do so, please include this problem report. You can delete your own text from the attached returned message.