[CentOS] postfix help. im clueless

[Feizhou]

Erick Perez wrote:
> Hi, I have been given the task to check on a postfix server that
> presents the following error:
> Let's say you use your hotmail account and then send a message to one
> of my users. The postfix program running on the server responds:
> 
> Jun  4 10:21:25 mail postfix/smtp[29744]: 553E01079AD:
> to=<email.elpanama at elpanama.com>, relay=localhost[127.0.0.1],
> delay=54253, status=deferred (host localhost[127.0.0.1] said: 451
> Unable to complete command, DNS not available or timed out (in reply
> to MAIL FROM command))
> 
> first, why is giving me a timeout?

We do not know. We do not run your box.

> and second, why in the response the to= field has the domain name?
> 

because the logs would otherwise be useless?