commit: 6b2ca8a - #414 (2014-03-05 12:54:44 -0500)
My experience is the success rate for guest posts is dropping lower and lower. I think one thing to touch on is the email subject. I think many bloggers have reached a point where there don't even check emails that are obvious guest post requests due to the huge % that are wasting their time and just after a link. Part of the trick could be ensuring your email gets read at all.