AVAST! mail shields blocking sent emails

After much diagnosis I have realized that AVAST! is blocking emails from being sent in Mozilla Thunderbird. I disabled the mail shields and then I could send emails instantly. Does anyone know a fix within AVAST! besides disabling mail shields? I’d like to still use the feature.

http://www.avast.com/faq.php?article=AVKB91

I followed these instructions and it said the certificate was already imported/installed? Am I missing something?

Try avast repair and reboot

Controlpanel > ad / remove programs > avast > uninstall / change > repair option

If a “repair” does not work I’ve seen a lot of posts on “email problems” where a clean install worked.
I assume you probably just did an upgrade within the GUI ?
I know everyone uses the “clean install” as a easy fallback…disclaimer…but I’ve read tons of email issue threads and this solved many. It really does not take a lot of time, maybe 15 minutes tops.

Avast Clean Un- & Re-Install

  1. Download Avastclear, Rejzors uninstall tool and the appropriate Avast program edition.
    Avastclear : http://files.avast.com/iavs9x/avastclear.exe
    Rejzors Uninstall tool: http://rejzor.wordpress.com/avast-cleanup-tool/

Here are the Avast installer links. Note: You need to be ONLINE during this install.
http://files.avast.com/iavs9x/avast_free_antivirus_setup_online.exe
http://files.avast.com/iavs9x/avast_pro_antivirus_setup_online.exe
http://files.avast.com/iavs9x/avast_internet_security_setup_online.exe
http://files.avast.com/iavs9x/avast_premier_antivirus_setup_online.exe

…Now…
2. Uninstall Avast by Control Panel>Programs [If you don’t have Avast in control Panel go to #4]
3. Run Avastclear in Normal Mode and allow it to Reboot PC into Safe Mode to complete the removal process.
4. Run Rejzors Uninstall Utility in Normal Mode (removes traces avastclear doesn’t) - reboot.
5. Be Sure To Check PC’s Device Manager…Control Panel>System Once Uninstall is Complete.
Make sure to show any hidden devices by selecting pull-down menu Device Manager>View>Show Hidden Devices
If there is anything related to Avast with a yellow triangle then uninstall it (highlight, right click) and reboot.
If you get an error just right-click & delete.
6. Install the Avast version you downloaded.
7. Reboot.