mail spam relaying incoming

[atomicmak]

i have been checking some things and found that my server is probably relaying incoming mails by
telnet (to my server ip) 25

mail from [email protected]
rcpt to : [email protected]
data
fdjkfsdj
.
OK

how would i stop that ?
As i have enabled POP before SMTP and
Pop Lock both but how would i stop this ?

as i find that my users getting so many spams daily i want to tune up and stop those all ways of getting spam.

please help me

 

[garan]

Hi Mak,

An open relay is where you can send email to domains that _aren't_ on your server. You must accept incoming mail on port 25 of the mail server to get any email for a domain.

Your server is functioning correctly.

To reduce spam I suggest that you look at some spamassassin based solution. I haven't used the official plesk solution for a while, having found that 4psa's clean server had more functionality. But be warned that this solution will increase the load on your Plesk server significantly due to Spamassassin's reliance on Perl. If you have many domains/many mailboxes then instead look at putting in dedicated spam/virus checking MTA's (ART's Project Gamera for example).

Cheers,

Garan.

 

[atomicmak]

i am using 4psa cleanserver and spamguardian both but still i am receiving daily tooooo much of spam my clients complaining.

so i am finding a proper solution..

 

[atomicmak]

also can someone tell me how to block some ip range for mailserver ?

i want to block
china
korea
singapore
russia

traffic for mails ..

 

[garan]

Have a look at the SARE ruleset at http://www.rulesemporium.com/ . I find it effective as to compete with the spammers you need to try and stay one step ahead.

Garan.

 

[atomicmak]

thanks garan,

is there any easy implimentation guide available for this rules ?

 

[jwdick]

Originally posted by atomicmak
also can someone tell me how to block some ip range for mailserver ?

I have not tried this, but from a previous tip that I keep, you can
block IP ranges in /etc/xinetd.d/psa_smtp

Add the following code after "wait = no"

no_access = xx.xx.xx.xx/18
no_access = xx.xx.xx.xx/13
no_access = xx.xx.xx.xx/13
no_access = xx.xx.xx.xx/14


You must restart xinetd afterwards.