Nestor wrote:
Any ideas, where I should look to find out it was set up so that
machine A can only
send mail to Machine B?
How about /etc/hosts.allow or hosts.deny?
How about IPTable/IPChains/ipfw/ipf rules?
These rules could be on the *destination* machines as well. Your
machine may have a different netmask/network number or may be
specifically excluded.
Start by trying to telnet from the Machine A&B to other machines port
25. That should at least give you some information.
Telnet is the only perfectly reliable mail and web client.
-a
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