MassInbox

Instantly scales your outreach campaigns with unlimited email sending accounts, unlimited warmup, and smart AI. Clean & verify your lead lists and ensure your domains are correctly set up for cold emailing. Our one-click bulk domain tester lets you know if your domain is missing important records. Our Campaign Builder lets you use variables, sequences and smart scheduling to maximize your deliverability and response rates. Instead of having separate campaigns for each of your sending accounts you can add all your sending accounts to one campaign. Instantly will then rotate sending emails between these accounts to make it more natural. Managing 1 inbox is easy - with Unibox you can manage tens or hundreds of inboxes simultaneously. Mark leads as positive or negative, forward or respond to them to book meetings and close deals from one simple inbox.

InboxFlow simplifies your cold email infrastructure from the get-go. When you buy your burner domains, we automate SPF, DKIM, and DMARC setup. Plus, they're automatically redirected to your landing page, ensuring your prospects never encounter an invalid page. With your domains and email authentication sorted, it's time to supercharge your cold email campaigns. InboxFlow's user-friendly interface empowers you to configure dozens of inboxes across different domains with unprecedented ease. Spend less time on setup and more time connecting with your prospects. InboxFlow's bulk-account upload feature takes your cold email game to the next level. We provide you with a CSV file that allows you to effortlessly import and manage multiple inboxes in your favorite sending tool. Say goodbye to tedious, manual processes, and hello to streamlined efficiency. Simplify cold email infrastructure for unbeatable deliverability.