Provozuji mailserver pro nekolik zakazniku (zadna high-volume site, jen radove tisice emailu denne), vyuzivam greylist, SPF, SpamAssassin, spam-signatury do ClamAV, ted dodelavam DKIM, blacklisty pouzivam take ale NIKDY k tvrdemu rejectu zprav (to se mi seredne vymstilo), pouze prislusny email oznacim do zahlavi, muze pak s nim pracovat klient dle sveho uvazeni:
blackholes.mail-abuse.org
dialup.mail-abuse.org
dnsbl.sorbs.net
dnsbl.njabl.org
cbl.abuseat.org
zen.spamhaus.org
hostkarma.junkemailfilter.com
drone.abuse.ch
httpbl.abuse.ch
spam.abuse.ch
bl.spamcop.net
bl.score.senderscore.com
b.barracudacentral.org
dnsbl-1.uceprotect.net
psbl.surriel.com
dyna.spamrats.com
dnsbl.ahbl.org