invalid helo cmd - bug or what?

[Matthias Schmidt]

Hello,
since updating to Powermail 6.2 emails can't be sent anymore.
The error is invalid helo command.
What I see at the server side is something like this:
Helo command rejected: invalid ip address; from=<n...@doamin.tls> 
to=<n...@doamin.tls> proto=ESMTP helo=<[::1]>
and of course the server is right, this helo cmd is invalid ;-)
So what's going on?
cheers
Matthias