Microsoft Outlook does not send messages

Hi there
Two days ago I downloaded new version of Avast Free and from that moment My Microsoft Outlook is not able to send new messages. So, while I can receive messages, I cannot send. I tried to unistall the program (NO CHANGE), then I installed again (NO CHANGE). I controlled Windows Firewall and seems to be OK. For your info, after the unistall I went to Windows System 32 Regedit to clear all concerning Avast. I don’t know what to do now. I remember that the new version of Avast Free said “Better controls for mailing”, but I did not suppose in this way… Please note that, when I try to send a new message, status pop window opens and it seems all OK, but e mail does not disappear from that window… What do you suggest, friends ?
Tks for your help.
Regards. Ennio - Verona/Italy

https://support.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1443

TKS but it seems to me I am not authorized to readf your link. So I don’t know what to do and nobody gives me an answer !!..
In the meantime, no email sent by me… Maybe I must charge Microsoft Outlook again … (… I hope not to do it !..). BYE
Ennio

Try it here. (Italian)
http://support.avast.com/index.php?languageid=9&group=ita&_m=knowledgebase&_a=viewarticle&kbarticleid=1448