I was taken captive and asked the question to Just Answer. Try again..
I am unable to send an email from any of my 3 Google apps accounts on my laptop since midnight 23rd. True if the email is composed, reply, or forwarded. I also am unable to even save a draft. The email either hangs and freezes "still working' after 10-15 minutes, or if I way long enough I get the following error reported; "Oops... a server error occurred and your email was not sent. (#001)" I get all inbound messages, bu am not able to send. All is normal on my desktop, but my laptop is my workhorse. I have spent about 72 plus hours chasing this down. It acts as if outbound service is blocked on the laptop, but I cannot determine how. I have McAfee Security Center, Firefox with cookies accepted. As much as I can tell the same on both systems.
Please rescue me in this wilderness of no human beings!
After checking extensively in google apps and McAfee permissions, removing all fire walls etc.. Nothing made a difference. I tried creating a new Firefox profile and all systems go. I had a similar mysterious sudden change when Firefox 3 was introduced and this was the work around. Unfortunately it is temporary and the problem will come back in days or weeks, always within a month.) Thanks for earlier help pushing me in unexplored right direction.