Less than 50% of our 1st campaign's emails were opened. What would you suggest as far as determining whether to continue sending to the entire list, or simply just send to the "opened" group.
I would not recommend limiting your send outs based on one single campaign. That said I personal lean towards the quality is more important than quantity, and would look at purging subscribers who have never opened an email after they have been sent a "reasonable" number of campaigns..
In fact I just posted on this exact subject over here
With some requests/suggestions on improving segmenting to make this easier for CM users.
Thanks Alex for responding. Matthew, also be sure to read http://help.campaignmonitor.com/topic.aspx?t=89 as not every open can be recorded. That article also has some information on typical open rates, and suggestions for improving it.