Mailserver on Linux

Hi, does anybody know how can i check which mailserver is running on my linux machine???

I need to know because i need to load a Spam filter.

Please help.

my Linux skills aren't of the best.

Thanks:dead:

You're likely to have either sendmail or postfix, they're probably the most common. Exim and qpopper are two other that I can think of at the moment.

If the mailserver is running, you can check which it is from command line with ps aux.