Can the following programs bar OUTGOING emails?

Question

I installed a kerio firewall, ad-aware SE, Spybot, AVG anti-virus & ccleaner, now some OUT GOING emails are returning or showing blocked by the recipients (although the recipeints never blocked them). Is it possible any of the above program installation is responsible for doing so or is there some other problem.

PS: I am sending emails from my company's websites.

Answer 1

No, The ones you mention would only monitor incoming traffic.

Some firewall settings can however prevent your mail server from connecting al together.