Unibox
A unibox is a single inbox view that pulls incoming replies from every mailbox and sending domain in a cold email campaign into one place, so a sender never has to check dozens of separate inboxes to find who wrote back. It is the reply-side counterpart to multi-inbox sending.
Why it matters for outbound teams
Cold outbound campaigns often send from many mailboxes to protect deliverability, which means replies land scattered across just as many inboxes. A unibox collapses that sprawl into one screen, so reps can find and answer positive replies before a prospect loses interest. Without it, teams either miss replies or waste hours logging into each mailbox by hand.
See every reply in one place
Master Inbox pulls email and LinkedIn replies from every sending tool into one inbox. Free 7-day POC. Unlimited users on every plan.
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