CTO, IT & COO
Outbound That’s Governed, Documented, and Defensible
Your sales team needs to run outbound. Your job is to make sure it doesn’t create security exposure, compliance risk, or operational chaos in the process.
The problem is that most outbound infrastructure is built for speed, not governance. Dozens of domains spun up with minimal oversight. DNS configurations that drift over time. Inboxes provisioned through third-party resellers of unclear origin. Authentication gaps that nobody monitors. IP addresses shared with unknown senders. No documentation, no audit trail, no clear chain of custody.
From a security and operations standpoint, this is an expanding attack surface with no controls. Every unmanaged domain is a potential spoofing vector. Every unchecked DNS record is an authentication gap. Every third-party tool with incomplete integration is a data handling question.
Production-grade email infrastructure is designed to be governed. Fewer domains, tightly controlled. DNS reviewed and maintained line by line. Clear chain of custody for every asset. Active monitoring and documented intervention protocols. Infrastructure that passes audit — not infrastructure that has to be explained away.
Senders offers three services that work independently or together. Here’s how each relates to what you’re responsible for.
Managed Email Infrastructure
You need the sending infrastructure to be governed, documented, and defensible under audit.
Managed Email Infrastructure is where we take operational ownership of the sending layer — domains, subdomains, IPs, DNS, authentication, warming, monitoring, and ongoing system health.
From a security and governance perspective, the key design principles are:
- Minimal surface area. We use fewer, aged domains — not dozens of disposable ones. This reduces the number of assets to track, reduces spoofing and impersonation vectors, and creates a tighter, more defensible sender identity. A streamlined domain structure avoids the appearance of spoofing caused by dozens of look-alike domains, which is a serious issue in high-trust industries.
- Tight authentication posture. DNS is reviewed line by line for every active domain. SPF, DKIM, and DMARC are configured not just to pass, but to present a coherent, trustworthy sender identity under advanced inspection. Alignment between authentication posture and observed sending behavior is continuously maintained.
- Active monitoring and intervention. Infrastructure health is tracked continuously — bounce classifications, rejection patterns, inbox placement signals, and enterprise gateway behavior. When issues appear, we intervene quickly and deliberately, with documented protocols. Nothing happens in a black box.
- Periodic DNS audits. We don’t review your setup once and walk away. Periodic audits catch creeping issues — infrastructure updates, internal changes, or third-party tools that quietly introduce misconfigurations. We aim to catch and correct these before they become systemic.
- Direct communication. You have a dedicated Technical Account Manager available via email, Slack, or call. If your team needs to understand what’s configured, what’s changed, or how something works, you ask and we walk you through it. We provide documentation for internal review on request.
Your domains remain your assets. We manage the operational layer — IPs, configurations, monitoring, and intervention. The line between what we manage and what you control is clear and well-defined.
Deliverability Consulting
You need someone to audit your DNS, authentication, and sending posture — and tell you what’s actually exposed.
If you don’t need ongoing infrastructure management but need an expert assessment of your current email security posture, Deliverability Consulting provides that.
The Diagnostic & Quick-Fix session reviews authentication configurations (SPF, DKIM, DMARC, alignment) as evaluated by real inbox security systems, not just pass/fail tooling. It also covers domain and IP reputation, sending behavior, and actual test results from major mailbox providers.
For IT leaders, this is useful when:
- You need to verify that your email authentication is actually protecting the organization, not just passing basic checks
- You’re inheriting an email setup and need rapid clarity on what’s configured, what’s exposed, and what needs to change
- You need to prepare for an audit and want third-party validation of your sending posture
- You suspect a third-party tool or integration has introduced misconfigurations you haven’t caught
This is advisory work. We diagnose, explain, prioritize, and guide — your team implements. You stay in full control. The engagement can be a single diagnostic session, a multi-week scoped project, or an ongoing advisory relationship depending on the complexity of your environment.
Outbound Operations
Your sales team is running outbound. You need confidence that it’s not creating security or compliance risk.
Outbound Operations is the execution layer — the team and process that actually runs outbound campaigns. For IT and operations leaders, the relevant question isn’t usually “do we want this service?” — it’s “how does what sales is doing get governed?”
When Outbound Operations runs on top of Managed Email Infrastructure, the governance model is built in:
- Sending happens through controlled, documented infrastructure, not ad hoc domain spinning
- All campaigns live in tools your team can see and audit
- DNS, authentication, and IP management follow defined protocols
- No accounts provisioned through third-party resellers of unclear origin
- No identity sprawl across dozens of unmonitored domains
The alternative — your sales team managing their own outbound through a patchwork of tools and freelancers — is what creates the security and operational risk you’re trying to prevent. Production-grade operations remove that risk by centralizing execution on governed infrastructure.
This Is For You If…
Where to Start
Talk to our team. We’ll review your current email infrastructure posture —authentication, DNS, domain governance, and operational controls — and giveyou a clear picture of where things stand. Whether you need managed infrastructure, a scoped audit, or just want to understand how outbound is affectingyour security surface, it starts with a conversation.
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 Senders handle DNS, SPF, DKIM, and DMARC across our sending domains?
We review DNS configurations for every active domain line by line, ensuring alignment with what security-conscious inboxes actually expect from legitimate senders — not just what passes a basic diagnostic check.
Most teams treat authentication as a pass-fail checkbox: SPF passes, DKIM passes, DMARC is set. That's table stakes. In high-scrutiny environments, inbox security systems look deeper — at alignment between authentication posture and observed sending behavior, at subtle inconsistencies, and at DNS configurations that don't match the profile of a durable, established sender.
Our configuration work addresses all of this:
- SPF: tightly configured to list only authorized sending IPs.
- DKIM: set up to present a coherent, verifiable sender identity under advanced inspection.
- DMARC: implemented at enforcement level — not “p=none.”
Beyond the individual records, we review overall DNS coherence: MX alignment, subdomain consistency, and ancillary configurations. Periodic DNS audits catch creeping issues from updates or third-party tools before they compound.
Who owns what? What's the custody and governance model for domains and IPs?
- Domains remain your assets throughout the engagement. Ownership never transfers.
- Operational configuration (subdomain architecture, DNS, authentication, warming protocols) is managed by us, but domains are yours.
- IPs are ours — clusters of pre-warmed IPs with established sending histories. If the engagement ends, IP access and reputation stay with us.
Communication happens through direct channels. Your Technical Account Manager is available via email, Slack, or call. Documentation is provided on request. The sending layer is managed professionally, with clear separation from what you control.
What is Senders' security posture? How is our data handled and protected?
Security is a design principle:
- Managed Email Infrastructure handles DNS configurations, sending metrics, and campaign performance data only.
- Email content and customer lists are not stored unless using Outbound Operations, in which case data resides in Apollo — a platform you control.
- Controlled access ensures all interventions are documented and traceable.
- Regulated industries can verify operational practices — only the sending layer is managed, sensitive business data remains yours.
How does managed outbound affect our domain's attack surface and exposure risk?
Done wrong, outbound expands your attack surface. Done right, it minimizes it:
- Disposable domains create spoofing vectors and impersonation risks.
- Our approach uses fewer, aged domains that are tightly controlled and actively maintained.
- Subdomain architecture is structured; abandoned or unused infrastructure is identified and remediated.
- Streamlined, well-governed sender identity is inherently defensible and harder to impersonate.
What's the escalation and incident response protocol when something goes wrong?
- Continuous monitoring: metrics deviations trigger defined protocols.
- IP issues: underperforming IPs are immediately replaced from pre-warmed clusters without sending interruptions.
- Domain issues: source is diagnosed and subdomain architecture allows isolated adjustments.
- Broader incidents: blacklisting or post-migration issues follow escalation protocols with documented, communicated actions.
Significant interventions are communicated via your Technical Account Manager.
How does outbound sales email avoid creating compliance or regulatory risk for our organization?
Compliance risk comes from unmanaged infrastructure, not sending itself.
- Production-grade outbound uses fewer domains, tightly controlled and consistently authenticated.
- Clear chain of custody for every sending asset.
- Documented configurations and change management.
- Active monitoring prevents issues from becoming compliance events.
Every domain under management has enforced DMARC, aligned SPF and DKIM, coherent subdomain structure, and controlled sending behavior. Outbound is auditable, defensible, and secure.
Do we need Managed Infrastructure, or would a Deliverability Consulting engagement to audit what we have be sufficient?
- Deliverability Consulting: one-time assessment of email authentication, DNS, and sending health. Your team implements fixes. Suitable if your challenges are configuration-specific.
- Managed Email Infrastructure: ongoing monitoring, DNS audits, IP management, and intervention. Required for continuous operational health.
Many teams start with consulting and discover systemic issues, then move to Managed Infrastructure based on evidence.
