Multi-inbox sending at scale
Run outreach across unlimited connected inboxes with smart rotation, parallel sending, and human-paced delivery patterns that protect account health and maximize inbox placement.
Platform capabilities
Everything you need for cold outreach that actually converts.
Mail Hauler Pro combines multi-inbox cold email sending, automated warmup, lead management, and deliverability infrastructure — built specifically for teams running outbound at scale.
Automated warmup & deliverability
Inbox vs. spam detection, bounce monitoring, real-time account health scoring, and auto-warmup — so your emails land where they belong from day one.
Lead management built to scale
Import from CSV, API, or Google Sheets. Prospects are automatically distributed across inboxes and account groups with flexible per-account sending controls.
Personalization & smart sequences
Dynamic variables, spintax, multi-step sequences, and thread-based follow-ups. Every cold email feels written by hand — even when you're sending millions.
Unified inbox for all accounts
Replies from every connected inbox in one place. Threaded conversations, IMAP sync, and direct response from a single centralized workspace.
Deliverability analytics that matter
Opens, replies, bounce rates, inbox placement, account health, and campaign performance — in clean dashboards built for outbound teams, not marketers.
Infrastructure engineered for outbound
Dedicated IP pools, DKIM/SPF setup, sending throttling, automatic failover, and suppression systems built for reliable large-scale cold email operations.
Automatic account health protection
Bounce spikes, spam placement, and sending limit violations are caught early — with dynamic throttling and auto-pause systems that keep your accounts safe.
Multi-layer email verification
Validate every lead before sending with a multi-layer verification engine that reduces bounces, protects domain reputation, and lifts inbox placement rates.
Automated FMCSA lead generation
Scrape FMCSA carrier data, extract verified business contacts, enrich lead info, and push clean prospects directly into active outreach campaigns — no manual work.
Ready to run cold outreach at scale?
Explore pricing, start free, or learn how the platform works end to end.