we are Provide Internet to customers , we have ASA5580 and cisco router but we see customers send spam to same site so I took email for many site our IP's it was blocked ?
so My question what cisco device or another device have solve my issue deny our customer send spam to internet to don't block our IP's !!
if I install IPS in ASA solve me issue !!
i want advice but we have more that 10 000 users
look our IP
Spam Blacklist check for X.X.X.X:
whois.rfc-ignorant.org has not blacklisted this IP
bl.spamcop.net has not blacklisted this IP
sbl.spamhaus.org has not blacklisted this IP
xbl.spamhaus.org has blacklisted this IP and the response is 127.0.0.4
zen.spamhaus.org has blacklisted this IP and the response is 127.0.0.4
or this site do block to our IP's