Email not sending

My quotes/invoices are not sending, I do not use SMTP, and the default add is the no-reply email.

Please assist.

Upgrade to the latest version from

What is the latest version, I am on 16.9.40 - it still worked perfect yesterday.

Ok I installed latest version all sorted, thank you

I can not send emails from Manager. I keep seeing “The remote name could not be resolved: '

Please assist me as soon as possible.

The solution is in this topic you are replying to. Upgrade to the latest version from

There is no update option, only free download like the first time it was downloaded.
Is this the correct way to do the upgrade?

This topic can help you. Auto update option is only of cloud edition for desktop edition you need to download and install setup every time a new version released.