multiple emails for order notifications

It probably doesn't work because you didn't add the [ file ] tag in your message. There is a button for that next to the file upload field.

You can send an email to nicolas at hikashop dot com

Looking at the log file, it says that only the test I made came through to the notification system of HikaShop.
That should mean that the PayPal notification server was blocked by something or that the system crashed before the end of the processing and didn't log the traces. Since you're saying that you're receiving emails, it means that the problem is the later case.
However, HikaShop doesn't have any known bugs there. So it's highly likely that you modified something either in the paypal plugin code or in the emails generation code which breaks the processing of the request before the end.
Did you do any modifications on that end?

The emails can be modified via the menu System->Emails if you have the Business edition.

Mmm. It will be hard to help you more if it doesn't come from there without tracing the problem directly in the code.

That would be a first step. But having also an FTP access would help in finding the problem.

Hi,

We tried to find a problem but everything is ok for HikaShop. There is no error in the log.

Also, I see that you made the order E4 and that you got only one notification from paypal for it. So it seems to be working.

Anyway, I've made a modification on your paypal plugin so that it will skip the notification if the order is already confirmed so you won't have that problem anymore.

Yes, you can turn it on and do a test. Note that you need to turn off the offline mode of your website in order for paypal to be able to notify your website.

If your website is offline, the payment notification from paypal would be blocked by joomla and hikashop wouldn't know that the payment has been made. That's all.