With my Gmail account I have just discovered Bananatag for Google Chrome as a simple extension
With a few simple adjustments to the settings, it works perfectly with no trouble whatsoever. Every new Email has the Bananatag marker and tracker checkbox included and a receipt message is received immediately the recipient opens the sent mail. Brilliant, it is extremely user friendly and the support people can be contacted easily and are prompt in replying.
With the free version, 5 Emails per day only are allowed, but for myself and many more casual Email senders, that is more than adequate.
Edited by John Bull, 16 October 2013 - 05:28 AM.