Please thank your supporters!

The least candidates can do is thank their supporters. It is almost impossible to believe that an email respond from a campaign to a supporter does not has the words thank you! But as in the example in Winning Campaigns Online there are indeed candidates that forget to say thank you. I would think that the "best strategy" to lose a supporter is to write plain, death emails after they have suscribed, donate or volunteer for a campaign. Emails respond should have a clear, short message. Make it personal and it will have more success. And please, write THANK YOU!