ummm its a residential service not a business service so my answer would be no.
If all you want to do is run an email/web server then its relatively easy to point your domian name at your current IP. Admittedly the reverse DNS will not match the forward dns but I've yet to hit any problems becuase of that.
Code:
[fraz@thomas fraz]$ host smartowner.co.uk
smartowner.co.uk has address 81.106.249.74
[fraz@thomas fraz]$ host 81.106.249.74
74.249.106.81.in-addr.arpa domain name pointer cpc4-cdif1-6-0-cust74.cdif.cable.ntl.com.