Other or undefined network or routing status

[cubells]

Hi all:

I've installed a debian server and all works great.

I've followed this tutorial:
http://www.howtoforge.org/perfect-se...nny-ispconfig3

In my server I have only one domain and about ten mailboxes for this domain.

Now I have a lot of problems because one or two mailboxes can't receive some messages.

The error shown on sender mail program is:

Failed: 5.4.0 (other or undefined network or routing status)

Is it a postfix configuration problem? smtp problem? a problem on network server?

Thanks a lot for your help!

[till]

Might be a dns problem or routing problem. Please check the mx records for that domain and also the route to the mailserver with e.g. tracert.