how to avoid spam mail from external network

[Paul Howarth]

Aaron Konstam wrote:
> On Thu, 2006-07-06 at 08:54 +0100, Paul Howarth wrote:
>> On Thu, 2006-07-06 at 11:15 +0530, yogesh at banasdairy.coop wrote:
>>> hi frieds
>>> i have mail server on linux
>>> my mail server generate spam mail
>>> how to avoid this spamming
>>>
>>> the spam mail will come from external globval network
>>> i thaught that my server any port is opren
>>> how to secure my mail server
>> You will need to tell people:
>>
>> * which mail server software you are running
>> * which configuration options you have changed from the defaults
>> * what the spam looks like (with full headers)
>>
>> Paul.
>   The above described information would be interesting but I think the
> answer is to use spamassassin which comes with the
> distribution. Instructions for use are on the web and in the file
> users_prefs.template. Use of procmail to separate the spam and non-spam
> streams would be useful.

He said his server was *generating* spam mail, which is a 
configuration/security/abuse issue.

SpamAssassin helps with filtering received mail, but not with this type 
of problem. Well, perhaps if SA was used for outbound mail too, but that 
would be partially addressing the symptoms rather than finding a cure.

Paul.