Mail to nowhere

[Noel]

On 6/16/2015 10:44 AM, Steve Matzura wrote:
> The next phase of my testing procedure involves the simple act of
> delivering mail to my test box. When I send a message to either a
> valid or relayed user at my remote machine's address, it never gets
> there. I know this virtually for sure because I'm tailing
> /var/log/maillog and nothing new has been added for the past hour. I'm
> thinking eventually my ISP will send the message back to me as
> undeliverable, and in that bounced message there may be some
> information about why it was undeliverable, but maybe someone has a
> thought as to why I'm not even seeing anything attempt to connect?

No attempt to deliver almost always means either:
- a DNS problem; the sender can't find the destination, or finds the
"wrong" destination.
- a connectivity problem; the sender can't connect to the
destination.  Possibly a firewall not open.