A repair is useful when you have avast already. But you already uninstalled it. So you may install anew, reboot, delete your firewall rules, reboot again, test and report back (without uninstalling again, so we can give you more instructions if necessary).
Any previous security tools should be uninstalled and the respective removal utility should be also ran (better under Windows Safe Mode).
For the mail shield, avast replaces you SSL (instead your current email clients), so that may need to be configured correctly in your email clients and in Avast.
Please report back (and probably you should have started a new topic, since your issue is different from this old one).