qmail doesn't send mail

I'm having obstacles about qmail. I was trying to install fixcrio that shold be correct hotmail mail sending issue. but it didnt work. and also it damaged my qmail configurations. i cannot get emails not.
it seems like my 25 port doesnt recieve. and i dont know how can I correct this.
I use plesk 9.3 and centos 5

my domain name : medyafil.com

if I try to check it for mx it doesnt give any responce now. how can I fix this port issue?
which configuration files might be related with that?
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middleofnowhereAuthor Commented:
allright. it seems 25 post is doesnt accept any connection. how can I check and correct this
Hmm, I'm unable to find any DNS information for that domain, MX or otherwise.  Is the server externally accessible?  If so, what's the ip and I'll test port 25 and see what it says.

Alternately, try running your qmail-smtpd run file manually.  It may kick out an error as to why the service isn't running. (if that's the case)

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middleofnowhereAuthor Commented:
finally I found the solution :

its working now. thanks
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