I get regular offensive spam and have set security to not allow spam but some still get through. The other issue is naturally some spam is not spam and by having to take this action I may miss something genuine. I suspect the source of the spam is one where the address is simply changed by a digit each time I block it. The top line is usually a woman's name but sometimes friends/busineeses may contact me quite genuinely in this way. What is the best way to tackle this?