For those disppointed with Mailbox&#x27;s abandonment, I&#x27;d love to hear your feedback on Polymail (<a href="https:&#x2F;&#x2F;polymail.io" rel="nofollow">https:&#x2F;&#x2F;polymail.io</a>). We&#x27;re in private Alpha right now, but we have many similar features to Mailbox like Read Later + some better ones like Email Tracking &amp; Send Later. Feel free to DM me on Twitter (<a href="https:&#x2F;&#x2F;twitter.com&#x2F;foolywk" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;foolywk</a>) if you&#x27;d like to be added to our next Alpha release!