If your posts include this automatically generated signature ("Sent from my iPhone...") I would suggest you turn off the feature which is (1) unnecessarily advertising Apple products, and (2) identifies the device you are using - which is not necessarily a good idea.

Instructions for removal:

http://www.iphonelife.com/content/ti...mail-signature

http://www.howtoisolve.com/change-ip...phone-ios-8-9/