Thunderbird SMTP Issues after Fedora 11 Upgrade

[Jim Duda]

After upgrading from fedora 10 to fedora 11, Thunderbird (3.0 beta) is
giving me fits. At first, I was unable to send any email.  I figured
out that I needed to disable "security and authentication' checkbox
in my SMTP server settings in order for mail to work.

This solution however doesn't work for newsgroups.  Any attempt to send
an emailfrom the newsgroup reader fails.  I get a message saying that
I need to  check my server settings.

Has anyone else encountered this issue?

This bug seems similar:
https://bugzilla.redhat.com/show_bug.cgi?id=505084

I had to send this posting from more normal email, and not the group
listing.

Thanks,

Jim