Just one mail more of Twat Darey is one too much!!
But be careful, you'll have to unsubscribe with the address he is using. If you try unsubscribing from another address, chances are he'll add you to his mailinglist with that address too.
Spam is a growing problem, around 90 % of all e-mail these days is spam. Best is to use common sense, don't trust any mail you have not asked for of which you don't know the sender.
Header files are always forged in 99 percent of all cases, e.g. the from and to fields are not the real addresses.
Every decent ISP these days will have spam protection, but you'll have to enable it first. This usually is done via a webform. Of course then you need to check your spambox every now and then, because legitimate mail (ham) may have been identified as spam by mistake.
Just search on the web for info. Anti-spam for BT customers: