Instantly & Smartlead admit it: Your open rate is LYING to you
Instantly and Smartlead both say their open data is unreliable. Bots, Apple and security scanners inflate it. We filter them out. Here's what's fake, and what a trusted open rate looks like.
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Educational Guides
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Cold Email Sending Strategy: Full Throttle vs Balanced vs No Follow-up Limit
Compare Deliveryman's three cold email sending strategies, Full Throttle, Balanced and No Follow-up Limit, with sample send schedules, pros, cons and tips on which to pick.
your domains got listed on SURBL in a batch. here’s the new pattern.
SURBL lists the domains inside your emails, not your sending IP. Here is how it works, what gets domains listed, which inboxes it affects, and exactly what to do if yours is on it.
Best Lead Generation Tools in 2026 (14 Tools Compared)
Choosing the best lead generation tool in 2026 is not just about finding emails anymore. The better question is: which tool helps you find the right people and enrich their data without turning your tech stack into a mess? That matters because lead generation is usually where the quality of the whole pipeline is decided. […]
Email Verification Status Explained: What Each Result Means (and What to Do About It)
Every email you send is a small bet on your sender reputation. Land in a real, active inbox and you earn a little more trust with mailbox providers. Hit a dead address, a spam trap, or a throwaway inbox and you chip away at the deliverability you've spent weeks warming up. The math is brutal: […]
Best Websites to Buy Inboxes for Cold Email in 2026
Buying cold email inboxes is one of those tasks that looks deceptively simple, until you've spent $300 on mailboxes that burn within 30 days, watched your reply rates crater, and started the whole cycle over. The market for cold email inboxes is full of low-quality providers selling warmed-but-not-really accounts that fail fast. This post is […]
Why Cold Email Outreach is the Most Powerful Growth Channel in 2026?
If you have never tried cold email outreach, you might be overlooking one of the simplest and most reliable ways to grow your business. Many founders and marketers still assume cold email is “spam,” but real cold outreach is not spam at all. It is a direct, personal, one-to-one message delivered to someone who can […]
Blacklist Removal Guides
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Kundenserver Blacklist Check & Removal Process
How to check if you are listed in the Kundenserver? How to remove a Domain/IP address from Kundenserver?
ORVE DB Blacklist Check & Removal Process
How to check if you are listed in ORVE DB? How to remove a Domain/IP address from ORVE DB?
Sector TOR Server Blacklist Check & Removal Process
How to check if you are listed in the Sector TOR Server? How to remove a Domain/IP address from the Sector TOR Server?
Case study
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You Don’t Have a Copy Problem: How 131 Cold Emails Got 17 Replies
Most people think they have a copy problem. They have a “nobody saw the email” problem. Here is how one domain and 131 cold emails got 17 replies (12.98%), and the 3 gates every cold email has to pass.
Case Study: How a Two-Domain Cold Email Campaign Reached a 46% Reply Rate
A B2B company contacted 1,226 independent publishers through Deliveryman AI, from just two warmed-up domains. The result: 564 replies, a 46.12% reply rate, and a 0.73% bounce rate. Here is the setup, the day-by-day numbers and what made it work.
DNS Setup Guides
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How to Add NS Records in Google Cloud
1. Find your NS records from your DeliverymanAI Dashboard & Copy them 2. Log in to your Google Cloud account & go to Cloud Home 3. Paste/Replace Old Nameservers 4. Wait for Google Cloud to propagate
How to Add NS Records in DynDNS
1. Find your NS records from your DeliverymanAI Dashboard & Copy them 2. Log in to your Dyn account & go to Overview 3. Paste/Replace Old Nameservers 4. Wait for Dyn to propagate
How to Add NS Records in ResellerClub
1. Find your NS records from your DeliverymanAI Dashboard & Copy them 2. Log in to your ResellerClub account & go to Products 3. Paste/Replace Old Nameservers 4. Wait for ResellerClub to propagate
Journey Guides
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We Tested Deliveryman on Microsoft 365 With GlockApps: 100% Inbox
Two GlockApps seed tests, real sends from Deliveryman infrastructure. Every Microsoft 365 seed landed in the inbox. Here are the results, including where we still fall short, and what drives Microsoft placement.
We Rebuilt Deliveryman From the Ground Up (Here’s Why)
Cold email has quietly become one of the strongest growth levers for most B2B startups. Not because it’s fancy.But because it’s direct. You’re reaching out to people who could genuinely benefit from what you’re building and starting conversations that can turn into partnerships, customers, or insights you simply can’t get anywhere else. At its simplest, […]
How-to Guides
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Email Blacklist Monitoring: How to Check If Your Domain Is Blacklisted (and Get Delisted)
Deliveryman AI checks every domain you connect against 100+ blacklists, every day. Here's how blacklist monitoring works, how to check if your domain is listed, and how to get delisted.
Cold Email Master Inbox: Read and Reply to Every Lead in One Place
A cold email master inbox puts every reply from every campaign and mailbox in one place. Here's how Deliveryman AI's Master Inbox sorts replies by sentiment and lets you answer every lead without switching mailboxes.
How to Warm Up Your Domain for Cold Email
New domains have no reputation, so cold email from them lands in spam. Here's how email warmup works, and how Deliveryman AI warms up your domain automatically.
How to Set Up a Cold Email Campaign: Step-by-Step Guide
Who you're emailing, what you'll send, where it sends from and when. Here's how to set up a cold email campaign in Deliveryman AI, from a blank page to launch.
How to Connect Your Domain and Create Cold Email Mailboxes (SPF, DKIM, DMARC)
Connect one domain and Deliveryman AI builds the rest: subdomains, 15 mailboxes, SPF, DKIM and DMARC, and automatic warmup. Here is every step, with screenshots.
How to Build Cold Email Sequences and A/B Test Your Emails
Build a cold email sequence with automatic follow-ups, personalise it with variables and spintax, and run A/Z tests with up to 26 variants per email to find what gets replies.
Quick Update Guides
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Introducing High Intent Leads
High Intent Leads shows you which leads are most engaged with your campaign, so you can follow up with them personally while their interest is high.