
A few years ago a friend told me about Streak, a Gmail extension that allows you to track whether your email has been opened. For me it was a game changer, simply because it allowed me to have some concept of whether or not a message had made it to the person I intended or had gotten stuck in a spam folder in…
from Lifehacker https://ift.tt/2QhW7VS
https://ift.tt/2IstXEO