As a journalist and blogger, emails are my favorite tool to connect with people. Unfortunately, I am not always sure if they receive my messages, so when they don’t respond, I find myself having to re-contact them.
Note that the people you contact will not know that you are tracking them.
Here is how things work on Gmail:
Signals is also compatible with Outlook for Windows, Salesforce, Hubspot, Nimble, OWA, and Outlook.com.
To start using Signals, visit http://www.getsignals.com.