Is someone trying to use my server for spam?

[defsoul]

Hi,
I've setup "The Perfect Server - Debian Lenny (Debian 5.0) With BIND & Dovecot [ISPConfig 3]" and everything is working fine.

I've setup one domain and using it for emails for my small company and eerything is working as expected.

I've just noticed a lot of the following warnings. is someone trying to use my server for spam? and how can I block things like these.

Oct 27 03:43:04 mail postfix/smtpd[4528]: warning: ppp-124-120-137-190.revip2.asianet.co.th[124.120.137.190]: SASL LOGIN

Thanks in advance

[mini14]

Yeah..your server and every other server on the internet!

If you are on the 'net you will see hackers, crackers and spammers trying every way they can think of to gain access to your server.

It's like the Wild West out there...always has been and always will be.

I put up a brand new one a couple weeks ago and like every other server I've deployed it wasn't online for an hour before I was already seeing attempts...just the way it is.