My company is Beijing JoinHope Image Technology Ltd. We released our compamy software in 2014.3 that is reported Virus by Avast. We think is a false-positive virus alert so I try to contact your Virus Lab for an analysis.
But the question is when i submit in your web is reported false ,i can’t give my software and my question to you.
Please Email to me so i can give my software to you. Thank you very much.

You can report a possible FP here: http://www.avast.com/contact-form.php

I have tried. The connection is broken when i click the Send Message button.
Is this a size limit for file?

You can also contact the virus lab via: virus[at]avast[dot]com

Yesterday I have contacted the mailbox:virus@avast.com.But there is no reply until now.
Is the mailbox right?

Yes. They’ll only contact you in case they need further info.

But if they are resolved, they will contact us by e-mail, right?

How many days they need as usually? A week or a month?

Usually not, but you can refer to this thread and maybe you’ll get an answer here.