Sales Leaders
Your Team Should Be Selling, Not Troubleshooting Email
When outbound works, it’s the most reliable pipeline source your team has.
When it doesn’t, it’s the most visible failure. Reps are frustrated. Campaigns produce activity but not meetings. Volume goes up but results don’t follow. Someone eventually asks: “Why aren’t our emails landing?”
The answer is almost never one thing. It’s the infrastructure underneath — the domains, IPs, authentication, and reputation signals that determine whether your email reaches the inbox before your message is even evaluated. Most outbound setups ignore this layer entirely. They optimize copy, targeting, and tools while the sending foundation quietly degrades.
Production-grade outbound is different. It treats the sending layer as the thing it is: the prerequisite for everything else working. When infrastructure is built to hold up under scale and scrutiny, your team can focus on what they’re good at — messaging, targeting, and selling.
Senders offers three services that work independently or together. Here’s how each connects to what your team needs.
Outbound Operations
You need consistent pipeline without your team spending half their day on campaign mechanics.
Outbound Operations is full-service execution: targeting, data sourcing, campaign construction, copy, testing, iteration, and scale — all running on production-grade infrastructure.
The day-to-day looks like this: we send you new copy and targeting for review, you approve it, and by the time you get on your weekly check-in, the audiences are loaded and campaigns are live. Each week you get an export of everyone who replied with interest. On the call, we adjust based on what the data says — new angles, refined targeting, copy tweaks. Decisions go through a direct line to your account manager, not a ticket queue.
The operational burden on your team is under one hour per week. Your reps get meetings, not maintenance. Everything is visible inside Apollo — audiences, campaigns, replies, performance — and all of it is portable if you ever want to bring execution in-house.
Behind the scenes, our operations team is coordinating with our infrastructure team on sender warmups, ramp-ups, and deliverability signals. That invisible work is what keeps everything running as volume and complexity grow.
Managed Email Infrastructure
Your reps can send — but emails aren’t landing where they used to.
If your team is already running outbound but deliverability has started degrading, the problem is usually the sending layer, not the campaigns. As volume increases, infrastructure that worked at smaller scale starts to buckle. Domains lose reputation. IPs get throttled. Authentication gaps that were invisible at low volume become blockers.
Managed Email Infrastructure sits underneath your team’s existing workflows. We operate the domains, IPs, DNS, authentication, warming, and monitoring — your team keeps using whatever tools and processes they already have. Nothing changes on the front end. What changes is that the foundation underneath is built to hold up as volume scales.
A single domain on our infrastructure supports up to roughly 4,000 emails per day, and a single sender typically operates at around 800 emails per day — without domain rotation or throwaway identities. When your team needs more volume, we add capacity through the same framework: aged domains, pre-warmed IPs, controlled ramp-up.
This is the right choice when you have people who can run campaigns but need the sending layer professionally managed so deliverability isn’t a constant fire drill.
Deliverability Consulting
You inherited a setup that isn’t working and need someone to tell you what’s actually wrong.
Sometimes the problem isn’t ongoing operations — it’s that something specific is broken. You stepped into a role and the email setup is a mess. A campaign went sideways and no one can figure out why. An ESP migration broke deliverability and recovery has stalled.
Deliverability Consulting is scoped, advisory work. It starts with a Diagnostic & Quick-Fix session: a deep review of authentication, reputation, sending behavior, and inbox placement signals. We tell you what’s actually causing the problem, what to fix first, what to leave alone, and how to verify the fix worked.
Your team stays in control. We diagnose, guide, and validate — but we don’t take over your systems. Many issues can be identified and resolved within the first session. When they can’t, the diagnostic establishes the foundation for follow-on work.
This Is For You If…
Where to Start
Talk to our team. We’ll walk through what your reps are running into, wherethe infrastructure stands, and what it would take to get outbound producingreliably — whether that means full execution support, managed infrastructureunderneath your existing team, or a targeted diagnosis of what’s broken.
Our Experience
We work with companies from a wide variety of industries, predominantly in the B2B sphere, but we don't play favorites.
SMB SaaS
You want to move upmarket, but enterprise inboxes don’t trust new senders. We help you build the reputation that opens doors beyond SMB.
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Health and Medical
Heightened security around patient data means aggressive filtering—even for legitimate outreach. We help you land in inboxes that are designed to keep strangers out.
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HR (Human Resources)
HR buyers sit inside large organizations with enterprise-grade filtering. Reaching them requires infrastructure that can survive that level of scrutiny.
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Agencies
Your best prospects have the tightest defenses. Without production-grade infrastructure, you end up fishing where the filters are weakest—not where the clients are best.
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Cyber Security
You’re selling protection, but your emails look like the threat. We build infrastructure that signals credibility to the systems you’re trying to get past.
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FinTech
Trust is the product. Disposable domains and inbox sprawl undermine that from the first touch. We help you show up like the serious partner you are.
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Testimonials
"Beyond deliverability expertise, we wanted an outreach partner with a strong understanding of the VC/startup...'' Read full case study
Arc
"There are so many moving parts of our business – why should we deal with as many moving parts needed for email...'' Read full case study
Stephanie Corder
"Getting things done more efficiently is a big part of what 8base is about. We understand the importance of fostering...'' Read full case study
8base
"Our experience with Senders has been great over the years. Lead Strategist (Velimir) and the team are able to adapt...'' Read full case study
Growrk
"We wanted an efficient, scalable way to reach more people who could benefit from our platform. Email outbound...'' Read full case study
SuccessionHR
"We wanted to add more volume to our campaigns without worrying about the backend – email warming...'' Read full case study
Pangea
"Compliance is at the core of our business, and deciding to reach out to prospects meant we wanted to make sure...'' Read full case study
Dataships
"Senders provides strategists who communicate effectively and execute the strategies that their team formulated for us...'' Read full case study
SUSO Digital
Senders Case Studies
SUSO Digital
- Industry - Marketing & SEO
- Project length - 2 years
- Key result - Market growth, funnel saturation
Growrk
- Industry - Information Technology & Services
- Project length - Ongoing
- Key result - New market penetration
Pangea.io
- Industry - Fintech
- Project length - Ongoing
- Key result - Safely scaled email outbound, moved off of Google, improved processes
Momofuku
Founded by chef David Chang, Momofuku is a renowned culinary brand with a nation-wide presence, including restaurants and an online store with delicious goods. They ran into an issue with their email sending – high bounce rates and blocked sending. With hundreds of thousands of people on their email lists eager to stay informed, and an impeccable reputation to uphold, Momofuku wanted to nip this problem in the bud quickly.
- Momofuku reached out to Senders to run a diagnostic test on their sending infrastructure and find the root cause
- Senders deliverability experts discovered an issue with their DMARC, which was preventing emails from being sent, as their WordPress wasn't aligned with their SPF
- Senders provided the most effective solution helping Momofuku restore safe sending, and suggested next steps to ensure everything keeps running smoothly on their end
- The client reported that Senders helped identify the problem and got them back on track
Andrew Yeung
Where many others see a problem, Andrew sees an opportunity. His work may center around product leadership at Google (and previously Meta), but his true calling is all about bringing brilliant change-makers together.
How it started: Andrew hosted small-scale dinners for a handful of people at the peak of the pandemic in NYC, to enable safe connections during the most isolating times. How it’s going: His events now count as many as 2,000 tech leaders each, and he has set up 100+ such parties for more than 15,000 people in the past couple of years. Andrew understands that if two minds are better than one, putting two thousand together, preferably in the same room, can make a profound difference.
Given the impact of his community-building efforts, people want him to be able to reach out – and email is often the best way to do so. So, we helped out a bit.
- Andrew came across deliverability issues that prompted him to get in touch with Senders and look into the best possible solutions
- The Senders team made the necessary domain configuration adjustments, with a focus on the domain’s email authentication settings to enhance security and deliverability
- The SPF record was updated to include “Brevo” (Sendinblue) to strengthen authentication and reduce the chance of landing emails into spam
- The DMARC policy update enabled better readability of DMARC reports for human analysts, which is essential for preventing email spoofing and phishing
- Senders fixed the missing DKIM setup with Google, so that it now shows the email hasn’t been tampered with in transit
- As a result, the client now has better, more stable email deliverability and security
Myrina.ai
Stands out as a trailblazer in empowering women entrepreneurs through technology and a supportive community.
Myrina.ai offers a cutting-edge range of AI-powered SaaS marketing and sales tools that cater specifically to female entrepreneurs and women-led businesses. Myrina.ai enables users to automate marketing and sales, while helping them scale their authentic selves while saving time and boosting conversions. Their Myrina’s Army community fosters a supportive platform that champions female entrepreneurs and their values, empowering them to conquer barriers and achieve their business goals. The company's dedication to providing not only top-notch technological solutions but also a platform for networking and mentorship underscores their commitment to fostering success among women in the entrepreneurial space.
Naturally, they wanted to make sure their email sending infrastructure was set up correctly to protect their reputation and successfully reach their recipients. Our deliverability team worked with the client’s team on:
- Aligning the client’s three domains with Amazon to make sure they are compatible and optimized in order to integrate with Amazon’s system
- Setting up a proper DMARC policy to protect their domains against unauthorized use and phishing scams
- Enhancing email deliverability as well as security, so that each email sent from these domains can be properly authenticated and more likely to land in the right inbox
- As a result, the client can protect the reputation of their business and domains, while safely sending out their email campaigns
Physician’s Choice
Sometimes the sheer number of options of any product can be daunting – how on earth do you pick the right one? This is especially true with supplements, as we can find them just about anywhere, but we can rarely understand a third of the ingredients listed. Unlike most, Physician’s Choice provides supplements with pure, potent ingredients that work. No fillers or “proprietary” blends with unidentified ingredients. They do the research, so you don’t have to.
- The client’s team spotted issues with DMARC failures in Google Postmaster
- The Senders deliverability team worked with the client to update the DMARC configuration to enable report collection
- The client is now able to obtain detailed reports to diagnose the exact causes of the failures and prevent them in the future with proper DMARC setup
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Email Spam Test Tools
To deep-dive into your deliverability challenges, prevent future issues, and improve inbox placement, try our complimentary Email Spam Test Tool.
Use Cases
It’s more than just keeping your emails out of spam – our approach protects your domain reputation, while helping you grow your sales pipeline with valuable, relevant prospects. Our infrastructure + methodology enable you to scale your cold campaigns safely and focus on engagement and closing deals.
Senders Protocol works for every kind of email, including your newsletter and opt-in marketing campaigns. Setting up and keeping your sending systems in good shape will boost your inbox placement, and free up your time to focus on strategy and creative – although we can help with those, too.
If you’re using email as one of your main internal communication channels – sending out employee newsletters, company announcements, invites, etc – deliverability matters here, too. Our methodology focuses on safety across the board, so your internal emails can grow on pace with your team, and always land where they need to.
Time-sensitive, system-triggered emails are a crucial part of your customer experience, as well as your overall reputation. To make sure they arrive on time (every time) and land in the inbox, Senders optimizes your infrastructure and separates transactional from marketing or cold emails (using subdomains/IPs), preventing one from harming the other’s performance.
Book a Free Troubleshooting Session
Our Deliverability expert will put your sending problems in perspective, determine the root cause, and suggest the best solutions to implement.
FAQ
How does Outbound Operations produce consistent pipeline without my team managing the mechanics?
Outbound Operations takes the entire operational weight off your team. We handle audience identification and building, data sourcing and cleaning, campaign construction, copy, testing, iteration, and scaling — all running on production-grade infrastructure. Your team's role is to point us at opportunities, approve direction, and follow up on interested replies.
The typical rhythm: we send new copy and targeting for your review. You approve it. By the time you get on your weekly check-in call with our team, the audiences are loaded and campaigns are live. Each week you get an export of everyone who replied with interest, categorized by response type. On the call, we adjust based on what the data says — new angles, refined targeting, copy tweaks.
The operational burden on your team is under one hour per week. Decisions go through a direct line to your account manager — not a ticket queue.
Behind the scenes, our operations team coordinates with our infrastructure team on warmups, ramp-ups, and deliverability signals. That invisible work is what keeps things running smoothly as volume and complexity grow. Your reps get meetings on their calendar without managing the machine that produces them.
My reps are sending, but emails aren't landing like they used to. What's going wrong?
This is one of the most common symptoms we see, and it's often not the copy or the targeting. It's about the infrastructure underneath.
As outbound volume increases, the sending layer that worked at smaller scale starts to buckle. Domains lose reputation because they've accumulated too much volume without the credibility to sustain it. IPs get throttled because inbox providers see patterns that look like spam — rapid scaling, inconsistent sending behavior, fragmented identity across too many domains. Authentication gaps that were invisible at low volume become blockers. DNS configurations that "passed" a basic check start failing under advanced enterprise inspection.
The result is that your reps' emails quietly start landing in spam or getting filtered upstream — and nobody tells you. Open rates decline gradually. Reply rates drop. Your team blames the messaging or the market, when the real problem is that the emails aren't reaching the inbox in the first place.
Diagnosing the specific cause requires looking at the full picture: authentication posture, domain and IP reputation, sending behavior, volume patterns, and how all of those interact with the inbox environments you're targeting. That's what our Deliverability Consulting diagnostic provides, and it's the first step whether you end up needing managed infrastructure or a targeted fix.
How quickly can we ramp up volume without hurting deliverability?
The honest answer is that it depends on the infrastructure you're starting with. The wrong answer is "as fast as possible."
Every new domain or sender goes through a controlled warmup period — gradually increasing volume to establish credibility with inbox providers. Rushing this process is one of the most common causes of deliverability problems. A domain that's pushed to high volume before it's earned trust gets throttled, filtered, or flagged, and recovering from that is slower than doing it right the first time.
On our infrastructure, a single domain typically reaches its operating run rate within about 30 days. From there, a single domain supports up to roughly 4,000 emails per day, and a single sender typically operates at around 800 emails per day. These aren't hard limits — they're sustainable operating guidelines shaped by the specific sending environment, the target audience's filtering posture, and engagement patterns.
If your volume needs exceed what a single domain can support, we add capacity through the same framework — additional domains, additional senders, additional IP support — without changing the operating model. Volume scales by adding properly warmed capacity, not by pushing existing infrastructure past its limits or fragmenting into dozens of disposable domains.
What does day-to-day execution look like? How much of my team's time does this take?
If you're using Outbound Operations, your team's weekly commitment is under one hour. Here's what that typically looks like:
We prepare new copy and targeting for your review. You approve or redirect. Our team handles everything else — audience loading, campaign setup, testing, iteration. On a weekly call, we walk through performance, discuss what's working, and plan adjustments. Between calls, your account manager is available on a direct line for questions or pivots.
Your team's primary job is evaluating results and pointing us toward new opportunities — new markets, new hypotheses, new angles. We handle the operational mechanics of turning that direction into live campaigns.
If you're using Managed Email Infrastructure without Outbound Operations — meaning your team runs their own campaigns on our infrastructure — the time commitment is effectively zero on the infrastructure side. Your team runs campaigns however they normally would. We manage the sending layer underneath. The only touchpoint is if we need to communicate something about infrastructure health or if your team has a question.
Reporting lives inside Apollo for Outbound Operations clients. Replies are categorized — Interested, Not Interested, Out of Office, etc. — so you can see exactly where things stand without digging through a separate dashboard.
Can my SDRs keep running their own outbound while Senders manages the infrastructure underneath?
Yes. That's exactly what Managed Email Infrastructure is designed for.
The separation is clean: your SDRs control the front end — the tools, the copy, the audiences, the targeting, the follow-up. We manage the sending layer underneath — domains, subdomains, IPs, DNS, authentication, warming, monitoring, and system health.
Nothing changes about how your SDRs work day-to-day. They keep using whatever tools and workflows they already have. What changes is that the infrastructure underneath is built to hold up as they scale — so they're not hitting deliverability walls, dealing with throttled accounts, or wondering why emails suddenly stopped landing.
This is the most common setup for teams that already have SDRs doing good work on the campaign side but are struggling with the backend. It's also a common transition path for Outbound Operations clients who eventually hire their own reps — they bring campaign execution in-house and keep the managed infrastructure running underneath.
Your SDRs get the benefit of production-grade infrastructure without needing to understand or manage it. They send. We make sure it gets delivered.
What reporting do I get? How do I know what's working?
For Outbound Operations, all campaign data lives inside Apollo, which your team has full access to. That includes audience data, campaign sequences, reply categorization (Interested, Not Interested, Out of Office, etc.), open and reply rates, and performance by audience segment.
On your weekly call, we walk through what's working, what's not, and what we're adjusting. This isn't a scorecard presentation — it's a working session where we make decisions about targeting, messaging, and volume based on real data.
On the infrastructure side, you receive transparency into system performance, monitoring results, and any changes we make. If we replace an IP, adjust a DNS configuration, or intervene on a deliverability signal, you know about it. Nothing happens in a black box.
The reporting philosophy is practical, not decorative. We focus on the metrics that actually drive decisions — reply rates, interested-reply rates, meeting conversion — rather than vanity metrics that look good on a dashboard but don't tell you whether outbound is actually producing pipeline. If something isn't working, we tell you directly and bring a plan for what to change.
Do I need Outbound Operations, or just Managed Infrastructure for my existing team?
It depends on where the constraint is.
If the constraint is execution — you don't have people to run outbound, or the people you have are stretched thin — Outbound Operations solves that. We handle the full operational scope so your team doesn't have to build and manage the function internally.
If the constraint is the sending layer — your team can run campaigns but deliverability is degrading as volume scales — Managed Email Infrastructure solves that without changing how your team operates. Your SDRs or campaign managers keep doing what they're doing. We manage the infrastructure underneath.
Some teams need both. Others need one or the other. The litmus test is straightforward: if your team has the capacity and skill to run campaigns but the backend is the bottleneck, start with Managed Infrastructure. If you need someone to run the whole thing, start with Outbound Operations. If you're not sure, a conversation with our team will help you figure out which is the right fit.
If your team manages the tech stack and wants to evaluate how infrastructure integrates with existing tools, our Sales & Revenue Operations page walks through that in detail.
What if our problem is deliverability, not execution? Can I just get a diagnosis?
Yes. Deliverability Consulting is a standalone service specifically designed for this.
It starts with a Diagnostic & Quick-Fix session — a working review of your authentication, domain and IP reputation, sending behavior, and inbox placement signals. We tell you what's actually causing the problem, what to fix first, and what to leave alone. Many issues can be identified and resolved within that session.
This is the right entry point when you're not sure what's wrong. Maybe emails stopped landing and nobody can explain why. Maybe you inherited a setup from a predecessor and it doesn't seem to be performing. Maybe you're preparing to scale and want to know whether the infrastructure can handle it before you commit.
You retain full ownership of everything. We diagnose and guide — your team implements. If the diagnostic reveals that the problem is systemic and ongoing infrastructure management would solve it, we can discuss that. But you're never committed to more than you need.
What kinds of companies and sales teams see results with Senders?
Our clients tend to be companies in high-trust, high-scrutiny industries — healthcare, fintech, cybersecurity, legal, HR tech, and enterprise SaaS among them. These are environments where sender credibility materially affects whether email reaches the inbox at all.
We work with hyperscalers and soon-to-be hyperscalers — companies backed by Y Combinator, Sequoia Capital, Founders Fund, Index Ventures, and Thrive Capital, among others.
The common thread isn't industry or company size — it's posture. Our clients are real companies emailing into real companies. They can't afford to burn domains, churn infrastructure, or show up in enterprise inboxes looking like a fly-by-night operation. They want outbound that reflects the kind of company they are.
Typical sales team profiles include founder-led teams that need to move fast without building internal operations, lean growth teams that want execution speed without sacrificing system integrity, and companies scaling into enterprise or regulated markets where the target audience actively filters unproven senders.
How does Outbound Operations compare to hiring another SDR or BDR?
There's nothing wrong with having an SDR — and many of our clients do. The question is really about how much of the outbound function you want to build internally versus hand off, and what capabilities you need underneath.
An SDR can handle the front end — targeting, messaging, follow-up, relationship building. What most SDRs can't do is manage the backend: scaling sending infrastructure without running into spam, managing domain and IP reputation, debugging deliverability problems, operating DNS and authentication at the level enterprise inboxes demand. That's a different skill set entirely, and it's the part that breaks first as volume increases.
Cost-wise, a fully loaded SDR hire is typically $60,000–$90,000+ per year before you account for tools, infrastructure, and the ramp-up time before they're productive. Outbound Operations at $3,600 per month covers execution, infrastructure, data, copy, and strategic guidance — and produces results from month one without a hiring cycle.
The most effective setup we see is a hybrid: Senders runs Outbound Operations to generate interested replies, and the SDR focuses on follow-up, qualification, and closing. You get the best of both — the execution machinery and the human relationship. If you eventually build enough internal capacity that you don't need our execution layer, you can transition to Managed Infrastructure only. The campaigns, data, and structure transfer cleanly because they were built in tools your team already accesses.
