Blacklists are dedicated databases that contain information about IP-addresses and domains spotted in spam-mailings sending. There could be many reasons for getting to this list: low quality of mailings, sending of messages to users who didn’t give a consent for it, existence of spam-traps and so on. The most important thing is that if domain or IP used by you is in some blacklists, the chance for your letters to be considered as spam by email robots is very high.
We have special tools for analysis of “cleanness” of domains and IPs. We use only clean addresses to send mailings from our servers (with a good reputation from email robots’ point of view).
We can provide you a dedicated IP-address for mailings in order to let your reputation not being dependent on other mailings, that are sent via common addresses. You can order this service here.