Outbound that lands, because the plumbing behind it was engineered, not assembled.
LeadSourcing runs full-funnel outbound for B2B teams on two engines: Mailheight, our agency sending platform, and the Hamcut Ecosystem, seven tools that find, enrich, validate, audit, write, and score every email before it reaches a send queue.
priya@acmecloud.com verified
list segment: 2,400 contacts screened
copy check: subject + body ham
from-address history reviewed
What are you looking for?
Pick the one that matches. We'll take you straight there.
Tools for my stack
You want the Hamcut Ecosystem running inside your own product or platform, via API.
02Lead generation
You want more qualified pipeline from outbound email, self-serve or fully managed.
03Fix my inbox trouble
Your email is landing in spam or getting flagged, and you don't know why yet.
Most cold email dies before anyone reads it.
A handful of quiet failures do most of the damage, and none of them show up until reputation is already gone.
Unverified lists
Purchased or scraped lists carry spam traps and dead mailboxes. One hit and the receiving mailbox provider remembers your domain for a long time.
Generic blasts
Copy with no research behind it reads like spam, because it is. Filters and recipients are both tuned to spot it instantly.
DIY infrastructure
DNS records, mailbox warm-up, ongoing monitoring. Built in-house, it eats weeks before a single qualified email goes out.
One pipeline, seven checkpoints, every email accounted for.
Every message we send for a client passes through the same sequence. Nothing skips a step.
FindValidEmail
Source verified addresses from a name and a domain.
02 EnrichEnricher
Confirm a contact's title and company are still current.
03 ValidateInboxSense
Screen every list against a spam trap database.
04 AuditDNSPulse
Pull the abuse history behind your sending address.
05 WriteWriter
Turn long content into copy people actually read.
06 ScoreHamcut
Score tone and rewrite anything that reads as spam.
07 SendMailheight
Sequence, send, and protect sender reputation.
The stack behind every campaign we run.
Mailheight
Our deliverability-first sending platform. Prospecting, validation, AI personalization, sequencing, and reputation protection, run as one connected system for every client account.
The Hamcut Ecosystem
Seven tools covering the entire outbound lifecycle: find, enrich, validate, audit, write, score, send. Each one API-ready, each one doing a single job well.
Open rate is a deliverability signal, not an engagement one.
Corporate security gateways open and click every link before a prospect ever sees the email, that part's well known. Less talked about: mailbox providers proxy opens too. Apple's Mail Privacy Protection pre-loads every tracking pixel automatically, whether or not a human ever looks at the message. Once you account for both, "open rate" is closer to a read on inbox placement than a clean measure of who's actually engaged.
What it sounds like from the other side.
"The team at LeadSourcing transformed our email campaigns, delivering impressive results and engaging content that resonated with our audience. Highly recommend their services for any business."
"Our experience with LSEM was exceptional. They provided tailored solutions that significantly improved our engagement rates and overall marketing strategy."
Notes from the deliverability desk.
Practical write-ups on outbound email, deliverability, and what we're seeing running campaigns for clients, updated regularly.
Ready to fix your inbox placement?
Tell us what's not working. We'll show you exactly where in the pipeline it's breaking.