A blacklist is a filter that prevents certain e-mail addresses or domains from receiving mails, independently from their subscription/activation state.

When you send a message to a given list, before each mail is actually sent, Sendblaster checks whether the recipent’s address or domain is included in the blacklist: if it is, the mail is skipped (an “blacklisted” message will be shown in the log panel).

Sendblaster supports two different blacklists:

• Addresses blacklist: enter here the e-mail addresses you don’t want any messages are ever sent to.
• Domains blacklist: instead of single addresses, you can specify whole domains (a mail domain is the part that comes after the “@” sign in an e-mail address: be careful not to include “www.” or any other third level domain name). When a domain is blacklisted, no address belonging to that domain will ever be sent a message.

You can enter items as free text; each row must contain one address / domain (and no extra characters: you can’t use wildcards). You can copy to / paste from the clipboard, in order to manipulate blacklists with third party software; or press Edit with Notepad button to open a blacklist with Windows’ built-in text editor (program execution stops until you finish editing and close Notepad).

Here is an example of a valid addresses blacklist:

address1@domain.com
test2@site.biz

and a valid domains blacklist:

domain.com
site.biz

The following blacklist is wrong because it includes wildcards (”*”) and third level domain names (”www.”):

www.domain.com
*@site.biz