Sender address rejected: Invalid sender;

[royce.smallbone at laneend.net]

Also posted on the forum:

Hi,

I have just installed kolab 2.0 according to the instructions in the Wiki (from
source)

I have managed to login to the web interface and setup a couple of users. I can
send e-mail from them fine, but if I try and send the kolab users e-mail from
an external account I get a bounce back of

SMTP error from remote mailer after RCPT TO:<royce.smallbone at domain.xxx>:
host kolab.domain.xxx [xxx.xxx.xxx.xxx]:
554 <royce.smallbone at nonkolabdomain.xxx>: Sender address rejected:
Invalid sender

Has anybody got any ideas? I have turned on the option "Accept Internet Mail" in
the management interface.

Thanks,
Royce