A few things to look at.
First - telnet into the Scalix server on port 25, to verify the Scalix smtp service (smtpd) is listening. Here's what you should see (although you may have Scalix 9.4.2).
[root@mail root]# telnet dsx1.scalix.field 25
Trying 10.17.112.70...
Connected to dsx1.scalix.field (10.17.112.70).
Escape character is '^]'.
220 dsx1.scalix.field ESMTP Scalix SMTP Relay 10.0.0.168; Thu, 26 Jan 2006 07:03
:34 -0800 (PST)
Certainly - if it's not listening, mail isn't going to get to the Scalix universe. If it is listnening , next verify that ther is an actual Scalix account with the Internet addres of the inbound message.
[root@nessie root]# ommapsmtp
jsmith@test.net
scalix:any:jsmith@test.net
…this indicates it is an acceptable address for Scalix to receive mail on. Alternatively if you see…
[root@nessie root]# ommapsmtp
karl@test.com
karl@test.com
…the lack of :any: indicates mail would bounce.
If both these check out Ok, post back here, we'll drill further.
kb