So my renewal came around this year and noticed that the Cyren & Message Sniffer renewal had doubled in price from last year! so didn't initially renew...

Only to regret it as the amount of spam was huge!

But it got me thinking that if the product was per domain I could offer it as an extra service to my customers to try to cover some of the costs of the renewal as some customers a re happy with the built in spam filtering but others would rather pay for an enhanced service.

Anyone else think this would be a good idea?