Hello !!!
At first I want to explain that I am from poland and my language remains a lot to be required 
I have Avast v4.6 Home … for recive and send my mails i use IncrediMail or The Bat programs.
My problem is that when I send or recive a mail the progress bar in these programs show me (at all time) that a progress is in 100% … but in real he send\recive it in some part of time…
When I turn off mail Avast scaner a progress bar behave normaly …
Can you help me ?
Please
Sorry for my english 
Welcome to the avast forum!
The change in the way the progress bar moves is caused by the way the Internet Mail Scanner works.
See this thread:
http://forum.avast.com/index.php?topic=19260.msg163467#msg163467
With The Bat you can use the avast pluging for the The Bat. If you do then the Internet Mail scanner will not affect the progress bar activity for it. The Incredimail progress bar will still be affected by the scanner.
There are some changes being made in the handling of email scans in the next update to avast - which is to be released soon. There are no details published yet so they may change the information in the thread I referred you to.
Jacek… welcome… You’re not alone. Poland has some famous members here: http://forum.avast.com/index.php?action=profile;u=6802
Welcome to forums and enjoy avast 8)