On 17/11/10 7:26 AM, Rob Kampen wrote:
Examining the postfix queue with postqueue -p: I see many (Host or domain name not found. Name service error for name=bdgiedjhea.po6e4ina.com type=MX: Host not found, try again) Jake@bdgiedjhea.po6e4ina.com My question - why does this stay in the message queue - why not dumped back with message undeliverable or dropped?
What is the complete output of postqueue -p? What is the From address and, more to the point, is it MAILER-DAEMON?
Agreed, however this opens a potential DoS attack vector - I'm trying to determine why my postfix even has these requests present as I'm not initiating the emails (as far as I know) and I do not forward emails for any other domains. I feel like I'm missing something......confused maybe
It could be backscatter.
Run postqueue -p and pick one of the messages, it shouldn't matter which. Then run:
postcat -q $MSGID | less
Where $MSGID is one of the messages in the queue. That will show you the message and headers. I'd be willing to bet it's your server trying to send a rejection/spam detection to a server.
Regards, Ben