16 Jun
2015
16 Jun
'15
7:27 p.m.
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.