Fixing email deliverability issues for a wealth management firm

Overview

Have you ever had an email you send land in the Spam folder? Now imagine all your emails doing this. It can be incredibly disruptive to any business relying on email for day to day operations. This exact scenario led to a UK-based wealth management firm approaching us for some help in rectifying this.

For a regulated financial services business, email is not a marketing extra. It is core infrastructure. When deliverability fails, client trust and operational reliability are both at risk.

The objective was to recover email domain reputation, restore reliable inbox placement for client communications, deploy a new email marketing platform with real-time CRM integration, and implement compliant automated lead nurture workflows, while cleaning and managing a large legacy contact database.

The core problem: poor email domain reputation

The firm had accumulated negative sending signals over time. These included cold outreach from the main domain, large legacy lists with unengaged contacts, inconsistent bounce management, no structured engagement segmentation, and limited visibility into how mailbox providers were evaluating their domain.

In financial services, reputation is everything. The same principle applies to email infrastructure. Mailbox providers such as Gmail and Outlook evaluate domain trust continuously. Once reputation declines, recovery requires structured, methodical intervention rather than simply switching platforms.

Solution architecture

Deploying MailerLite with real-time CRM integration

We implemented MailerLite as the new email marketing platform and integrated it with the firm's CRM via the MailerLite API. This allowed real-time synchronisation of contact updates, automated tagging and segmentation, web form capture directly into the CRM, lead scoring and nurture triggers, and suppression management across both systems. Marketing and advisory teams worked from the same source of truth throughout.

Separating cold outreach from the primary domain

Before any sending activity was resumed, we created a separate sending domain exclusively for outbound prospecting. This domain redirected to the main website but insulated the core brand domain from negative signals generated by cold outreach. For a wealth management firm, protecting the primary domain is non-negotiable: it directly protects the reliability of client communications.

Technical deliverability foundations

Before sending a single campaign, we corrected the technical configuration, including SPF records, DKIM authentication, DMARC policy, and dedicated sending domain alignment. We also implemented Google Postmaster Tools to monitor domain reputation and GlockApps for inbox placement testing across providers. This provided measurable, ongoing visibility into how mailbox providers perceived the domain as reputation recovered.

Structured list rehabilitation

The firm held a substantial historic database. Rather than sending to the full list, we implemented a staged rehabilitation process designed to rebuild positive engagement signals gradually.

Contacts were first segmented by mailbox provider, prioritising inbox-positive domains such as Gmail before moving to others. They were then grouped by last engagement date, from recent activity through to contacts inactive for over 180 days, with only warmer segments activated initially. Volume was ramped in controlled micro-batches, starting at 50 contacts per day and increasing gradually, to allow mailbox providers to reassess the domain without triggering spam filters through sudden volume spikes.

The four-email re-engagement framework

Each segment received a controlled re-engagement sequence across four emails, spaced three days apart. The sequence was designed to prompt a reply, follow up softly, prompt a click, and finally ask a no-oriented question to encourage a response from contacts who had not yet engaged. Only three signals were measured: opens, clicks, and replies. This kept the focus on genuine intent rather than vanity metrics, and allowed clear decisions about which contacts to retain and which to remove.

Bounce management and automated follow-up

Hard bounces were removed immediately. For soft bounces, we built automation inside MailerLite to create a task in the CRM and trigger outreach via LinkedIn or another regularly used channel, prompting direct confirmation of the correct email address. This process alone salvaged an estimated 10 to 25 per cent of contacts that would otherwise have been permanently lost.

Automated lead nurture with human oversight

Beyond deliverability recovery, we implemented automated web form capture, real-time CRM assignment, behaviour-triggered nurture sequences, and task creation for advisers. Manual oversight checkpoints were built into the workflows to ensure compliance and relationship integrity. For a wealth management firm operating in a regulated environment, that balance between automation and human intervention is critical.

Key takeaways for wealth management and professional services firms

Deliverability is infrastructure. For regulated financial services businesses, the ability to reach the inbox consistently is as operationally critical as client confidentiality and regulatory compliance. The principles that drove this engagement apply regardless of the platform in use.

Protect your primary domain from cold outreach at all costs. Configure SPF, DKIM, and DMARC before sending anything. Use monitoring tools such as Google Postmaster and GlockApps to maintain visibility. Segment aggressively, ramp volume gradually, and build list hygiene into your standard operating rhythm rather than treating it as a one-off exercise. Re-engage dormant contacts before removing them, and integrate your email marketing platform directly with your CRM so that marketing and client-facing teams always share the same data. Finally, ensure that automation is combined with human oversight wherever your regulatory environment requires it.

Achieving similar results on other platforms

The strategy above is platform-agnostic. The tools change; the underlying principles do not. The same outcomes can be achieved using HubSpot, Mailchimp, ActiveCampaign, or Zoho, provided the data model, segmentation, and hygiene practices are implemented correctly from the outset.

HubSpot's Marketing Hub supports workflow-based nurture, built-in deliverability analytics, and domain authentication configuration. Mailchimp provides domain authentication, engagement-based segmentation, and re-engagement campaign tooling. ActiveCampaign offers advanced automation workflows, engagement tagging, and deliverability reporting. The most reliable approach in all cases is to define your segmentation, processes, and compliance requirements first, then choose the platform that supports them cleanly.