Our installation of Britemail is running extremely well except for two types of Spam that we cannot seem to block. I welcome any and all suggestions???
First, we tend to get blasts of e-mail from domain names that change daily - yet all resolve back to 184.82.17.xxx. Even though we have blocked that IP range in Britemail, (and at our router) they still get through. I can only assume they are IP spoofed - but perhaps there is a way to do a resolve that I don't know of.
Secondly, is there any way to block e-mail from domains like User@amy.spamco.com or User@spamco.com.ur ? These double domain or domain + second type extention tend to be sent out in bursts (i.e. user@amy.cpamco.com, user@beth.spamco.com, user@mary.spamco.com, user@rose.spamco.com...)