Email delivery issue

I am fighting with email delivery from few days. I tested urBackup with postfix and EmailRelay the problem is:
urBackup request VRFY but smtp servers refuse it but giving information that email will be accepted - unfortunately urBackup instead of sending email is closing connection saying QUIT.
email relay is under windows and postfix is under debian/ubuntu - even stupid apps are able to use this email-relays but not urBackup - am I doing something wrong ??

If i disable VRFY on server (disable_vrfy_command=yes) it is even not possible to save settings with test option - “Send test mail to this email address after saving the settings (leave empty to not send a test mail)”

This is an issue with newer cURL versions.

It was fixed a few days ago in 1.4RC2.

Yes it is working in version 1.4RC2 - thanks for info.