Deliverability & List Cleaning
Inbox placement, sender reputation, and list hygiene - the infrastructure that determines whether your email program is actually working or just appearing to.
An email program can appear to be functioning while delivering less than half its sends to the inbox.
Open rates look normal because the denominator - delivered messages - is calculated against what left the server, not what reached a primary inbox. Sender reputation degrades gradually, then suddenly: one bad send to a stale list, one spike in spam complaints, and the ISPs that handle your recipients' email start filtering your traffic by default. Most deliverability problems are preventable. Most are also invisible until they've already done significant damage.
How We Work
We audit email programs against the full set of deliverability signals: authentication configuration (SPF, DKIM, DMARC), sender reputation across major ISPs, bounce classification and suppression behavior, list hygiene, and the engagement patterns that inbox providers use to determine whether your mail is wanted.
Fixes address root causes - a misconfigured authentication record, a list that was never properly cleaned, a suppression logic gap that's been letting complaint-prone contacts back into sends. We also establish the monitoring cadence that catches the next problem before it compounds.
Start a Deliverability & List Cleaning Program
Connect with Phil to discuss your goals, your current program state, and how Tactical Marketing structures execution engagements.
Contact Us"The automated Certificate program that the Tactical MA team and I worked on earlier this year wrapped up a few weeks ago and generated over $10 million in deposits."
What a Deliverability & List Cleaning Engagement Delivers
Related deep dive
Email Deliverability →Reputation, authentication, and inbox placement under one operator.
Or browse the full operations library.
Frequently Asked Questions
Our open rates collapsed suddenly. Can this be fixed, and how long does recovery take?
Usually yes - but the honest answer on timeline is that sender reputation recovers on the ISPs' schedule, not yours. A sudden collapse typically traces to a specific event: a send to a stale list, an authentication record broken by a DNS change, or a spam trap hit that tipped a filtering threshold. We diagnose the trigger first, fix the root cause, then rebuild sending patterns gradually - warming engaged segments before the full list. Meaningful recovery typically runs four to eight weeks; anyone promising to fix reputation in days is describing something that doesn't exist.
What does list cleaning actually remove - and won't we lose reachable contacts?
We remove what's actively damaging you: hard bounces, spam traps, role addresses, and records so chronically unengaged that continuing to mail them teaches inbox providers your mail isn't wanted. That last category is where teams hesitate - but a contact who hasn't opened anything in eighteen months isn't an audience, they're a liability attached to every send. We segment before we suppress, run re-engagement where the data justifies it, and document exactly what was removed and why. Smaller list, better placement, more actual humans reading your email.
Is deliverability a one-time fix or does it need ongoing monitoring?
The repair is a project; staying delivered is a practice. Authentication gets fixed once, but reputation, list hygiene, and engagement-based filtering shift continuously - and the failure mode is silent, because open-rate dashboards look normal long after inbox placement has degraded. We establish monitoring with defined alert thresholds - bounce classification trends, complaint rates, placement testing - so the next problem surfaces in days instead of quarters. Some clients run that monitoring internally with our documentation; others keep us on for it.
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If something isn't behaving the way it should, that's where we start. Phil reads every inbound personally and responds within one business day.