mail problem

[fedora-user]

Sam Varshavchik wrote:

> gm writes:
>
>>
>> Hey guys,
>>
>> I found out that my server (FC1) has been blacklisted by some sites. I
>> was wondering if there's a way to determine why it's been blacklist.
>
>
> Yes, there is.  All known public blacklist sites provide an 
> explanation, usually at the URL given in the bounce message, or 
> indirectly via their web site, after you submit your IP address.
>
> All you have to do give yourself sufficient motivation to go and 
> investigate the situation by yourself, instead of sitting back and 
> waiting for someone to work Miss Cleo's crystal ball, and figure out 
> what your problem is, without you providing a single bit of useful 
> information, such as what your actual IP address is.
>
>> think it's because there mite be an open relay in my server. I was
>> wondering if there's a way to test for this on my server? In general I
>> was wondering how to test the security of my network on the whole in
>> case there are other leaks on the network.
>
>
> Your first step is, again, to obtain the reason for the alleged 
> blacklisting.  Once you've determined what the reason is, you'll be on 
> your way to investigating the nature of the problem.
>
If you have your own mail server and any DNS issue, you can go to 
www.dnsreport.com to test your domain name.