Their objective
Expand the client roster and revenue through a managed cold-email program that could deliver qualified conversations and measurable sales opportunities.
Cold email outreach case study
How cold email created $8,000 in opportunities in one month.
Client overview
A strong business ready for a stronger acquisition system.
A US-based digital marketing agency with strong delivery capabilities but limited internal capacity for scalable lead generation and outbound outreach.
The challenge
The agency needed specialist email infrastructure, reliable lead sourcing, qualification, and a way to operate larger campaigns without damaging deliverability.
Our digital marketing solution
Build the outbound engine before increasing send volume.
Yellow established the technical sending infrastructure, sourced and qualified prospects, and managed campaign execution through Instantly.ai. Messaging was shaped around relevance rather than volume alone.
Deliverability, opens, clicks, replies, and opportunity quality were reviewed together so each round of outreach improved the next one.
How we did it
A complete outreach system—from infrastructure to booked conversations.
Every stage protected sender health while improving the relevance and commercial value of replies. Clean data, careful audience segments, controlled sending volume, and responsive message testing worked together to turn outreach activity into conversations the sales team could genuinely progress.
Domain setup
Mailbox warming
Lead sourcing
Data validation
Audience segments
Message strategy
Sequence build
Campaign launch
Reply handling
Reporting
Free lead-magnet campaign
Turn useful expertise into measurable demand.
Helpful content creates a reason for the right prospect to engage before they are ready to buy. Yellow connects that value to focused promotion and clear follow-up.
- Generate more qualified leads and conversions
- Build a useful first-party contact list
- Maintain prospect engagement and interest
- Improve retention and sales follow-up
- Amplify the impact of every campaign
Free growth playbook$8,000
opportunity value
Strategy · Media · Conversion
The results
Eleven thousand sends became sixteen real opportunities.
In one month, the campaign sent 11,900 emails and achieved a 43% open rate, a 1.1% click rate, and a 2% reply rate.
The most important result was 16 qualified opportunities potentially worth $8,000 in new business, with many replies progressing to Google Meet conversations.
The agency also finished with protected sending infrastructure, validated prospect data, and a measured outreach process it could repeat without rebuilding the channel from scratch.
Performance trendCampaign period
Before + after analysis
See what changed—not just what increased.
Better results came from fixing the system behind the numbers: targeting, message, journey, and measurement.
What held performance back.
- No dedicated infrastructure
- Manual prospect research
- Limited outreach expertise
- No scalable campaign system
What changed the trajectory.
- Protected sending foundation
- Qualified lead pipeline
- Measured sequence strategy
- 16 commercial opportunities
Spend less and earn more
Volume created reach. Relevance created revenue.
The campaign succeeded because infrastructure, data quality, messaging, and reply handling were managed as one workflow.
Instead of chasing vanity metrics, the program optimized toward useful conversations—giving the agency a repeatable outbound channel and a clear line to revenue.
I couldn't recommend the team more highly. Their work is impeccable and their communication is incredibly professional.
White-label onboarding
A simple, confidential path from opportunity to delivery.
Your agency remains at the center of the client relationship. Yellow brings the audit, strategy, specialists, and reporting structure that make confident delivery possible.
Your next growth story
Can Yellow take care of your clients?
Book a focused strategy call and see how our white-label team can support your agency's next result.