Wanadoo (formerly Freeserve) has decided to block emails to the 200 addresses of my tennis club members. It thinks it's spam if there are more than 12 recipients! All they have suggested is to split them into groups of 10. Dave Cooper
Many ISPs are blocking mass mailings, though it doesn't seem to have reduced the amount of spam around. I'd suggest switching to a mailing list distributor such as Topica or Coollist. All your members will have to sign up in order to receive your emails, and will be able to unsubscribe.