Mailround.com is a great concept, if it worked. it has restrictions on what email client you use and what ISP you have. the idea is that you download the software and for every mail you send this gets stamped with an advertisement. if you go for this you will have to check that the software works on your PC.
mail round pays you on a monthly basis, and only once a month and can be frustrating waiting for your account to update. the more you send mail the more you will get paid and this can be as much as £40 or as little as nothing. though many people have had good experiences with this services I have not.
the range of items you can get with your rewards is also limited. this ranges from £10 Tesco vouchers to a £50 cheque in the post, though I think it would take about 10 years to achieve this amount.
customer service isn’t that good either. if you email them with a question they send you a automatic response, and not answered by a human. though if you do decide to join enter kawal@kawal.worldonline.co.uk into your referral box and you will be presented with a head start.
over all I wish I thaught of the idea, and could probably have done it much better. have fun mailing.