667 firewall blocks email client

Under the new 667, when using emailer client mutt/exim under XP/Cygwin (which I have used for years without problems under all non-ESET major security applications, and now ESS including ESS 657), I am getting
"host defer (-36): host lookup for XXX.com did not complete (DNS timeout?)"
(I've blocked out the name of XXX).

So, I tried turning on Interactive Filtering. This works as advertised for Thunderbird, my intranet printer, etc., by popping up windows so I can allow these applications. However, I get no popup windows for mutt or exim, but I get the same problem. Even when I explicitly put mutt and exim into permitted applications, and even add into an email client list, I still get failures as above. I also tried setting "Maximum compatibility" under POP3 without any success.

DNS lookup requires accepting info from outside connections, and I guess that Cygwin/mutt/exim uses different applications than, say, Thunderbird, and these are being blocked (but ess-667 does not register these to pop up a window under Interactive Filtering?)? It seems that I should be able to use Automatic Filtering as I have previously, by tweaking some new ESS setting

What is the URL to (re-)download version 650?

Lester