Your open rates are tanking. Bounce reports are spiking. Campaigns that once drove leads are suddenly dead on arrival. The likely culprit is email blocklisting.
If your HubSpot-connected domain or IP address appears on one of these lists, your marketing engine stalls quickly, and the damage will not fix itself.
Most teams do not catch blocklisting until inbox performance drops sharply. It often starts with unclean lists, expired DNS records, or cold domains sent too aggressively. Without active monitoring, those risks pile up quickly, and one day your emails simply stop reaching people.
This guide walks you through exactly how to remediate blocklist issues inside HubSpot.
You will learn what blocklisting means for your setup, how to identify the root causes, and how to rebuild trust with inbox providers so you can start reaching real people again.
How Blocklist Remediation Works for HubSpot Marketing Emails
Think of blocklist remediation as a repair job for your email reputation. When your domain or IP winds up on a blocklist due to poor sender behavior, inbox providers start rejecting your emails, no matter how good your content is.
In HubSpot, this process focuses on improving the technical and behavioral triggers that caused the listing in the first place. You manage these settings from Marketing > Email > Configuration, where you control domain authentication, bounce tracking, and sender performance.
Remediation is not a single task. It spans multiple parts of your HubSpot environment.
- Verifying the sending domain and fixing authentication gaps: Confirm SPF and DKIM are properly aligned.
- Scrubbing outdated or disengaged contacts from your database: Remove addresses that increase bounce risk.
- Setting up suppression logic to avoid high-risk sends: Prevent inactive or invalid contacts from receiving campaigns.
- Auditing performance trends using email analytics dashboards: Track recovery signals over time.
While HubSpot does not submit delisting requests on your behalf, it provides detailed deliverability insights so you can take corrective action both inside the platform and with external blocklist providers.
How It Works Under The Hood
When you click “send” in HubSpot, your email is routed through your configured sending IP, either shared or dedicated, and authenticated against your domain records. If your sending behavior includes too many invalid addresses or repeated spam signals, mailbox providers begin flagging your IP or domain.
Remediation depends on balancing several inputs and outputs.
Inputs
- Correct SPF and DKIM configuration: Authentication must pass consistently.
- Clean, regularly validated contact lists: Invalid addresses need to be removed.
- Reasonable sending patterns: Sudden spikes in volume raise red flags.
- Engagement metrics: Opens and clicks indicate real user interest.
Outputs
- Improved inbox placement: Messages are accepted instead of rejected.
- Reduced hard bounces: Fewer invalid recipients across campaigns.
- Higher sender trust scores: Reflected in HubSpot and third-party tools.
- Stable performance indicators: Open rates and domain scores trend upward.
Optional HubSpot features can strengthen this recovery loop.
- Dedicated IP Sending: Gives you full ownership of your sender reputation.
- Suppression Lists: Filter out cold or risky contacts before sending.
- Email Health Monitoring: Highlights trends that guide recovery decisions.
When list health and authentication are prioritized over time, mailbox providers gradually regain confidence in your domain.
Main Uses Inside HubSpot
Blocklist remediation supports different teams for different reasons. When marketing, operations, and RevOps understand how their actions affect email health, recovery happens faster.
Deliverability Audit And List Hygiene
A targeted audit is the first step. HubSpot allows you to filter contact records by bounce reason and engagement activity to identify problem segments.
Example:
A team segments contacts by “last email opened” and creates a suppression list for contacts inactive for more than 12 months. Removing those addresses immediately reduces bounce rates and signals responsible sending behavior.
Domain Reauthentication And Technical Setup
In some cases, technical configuration causes the issue rather than the content. Operations and IT teams use remediation to resolve broken DNS records.
Example:
An IT manager discovers the domain’s SPF record exceeds the permitted length, causing authentication failures. After restructuring the record and re-verifying it in HubSpot, authentication passes, and inbox placement begin recovering within days.
Engagement-Based Segmentation For Campaign Health
Blocklisting often highlights poor targeting. Engagement is a strong signal that mailbox providers evaluate.
Example:
Using HubSpot workflows, lead scores are assigned based on email opens and clicks. Contacts inactive for six months are automatically unsubscribed or added to a suppression list. Campaigns then reach only engaged recipients, lowering future risk.
Common Setup Errors And Wrong Assumptions
Misunderstanding how email systems interact can slow recovery. Avoid these common mistakes.
Error: Thinking HubSpot handles blocklist removal automatically.
Fix: Identify the blocklist that flagged your IP or domain and submit a removal request directly. Tools like MXToolbox or Talos help pinpoint the source.
Error: Continuing campaigns during remediation.
Fix: Pause all sends. Sending while blocklisted worsens sender’s reputation. Clean lists and restart gradually.
Error: Skipping SPF or DKIM verification.
Fix: Confirm both records show as verified in HubSpot. Sending without authentication severely limits recovery.
Error: Ignoring metrics after resuming sends.
Fix: Monitor bounce rates and engagement daily for the first two weeks. Early trends indicate whether recovery is working.
Step-By-Step Setup Or Use Guide
Before starting, confirm your HubSpot user has full access to the domain and email settings. You will also need DNS access and a list of blocklists that flagged your domain or IP.
Follow these steps to remediate blocklisting inside HubSpot.
- Verify your sending domain.
Check SPF and DKIM under Settings > Marketing > Email > Configuration. Both must show “verified.” - Pause all active marketing emails.
Stop campaigns and workflows to prevent additional bounces or spam complaints. - Identify bounces and problem segments.
Use email analytics to locate hard bounces. Filter exports by failure reasons such as “user unknown.” - Remove or suppress invalid contacts.
Run workflows to unsubscribe invalid addresses or move them to a non-marketing suppression list. - File delisting requests with blocklist providers.
Visit each provider’s site and submit a removal request using your verified domain or IP. - Warm up your domain.
Resume sending in small batches, starting with highly engaged users and gradually increasing volume. - Rebuild engagement through content and segmentation.
Use Smart Lists to focus on opted-in, active contacts. - Track domain performance and bounce rates.
Review metrics in Reports > Analytics Tools > Email and watch for steady improvement.
This process resolves technical issues while correcting risky sending behavior, helping restore long-term sender trust.
Measuring Results In HubSpot
Once remediation is underway, metrics confirm whether recovery is real. HubSpot offers several reports for tracking progress.
- Email Performance Dashboard: Tracks opens, clicks, unsubscribes, hard bounces, and spam complaints.
- Post-Send Event Timeline: Shows when mailbox providers resume accepting messages.
- Contact Engagement Reports: Measures response from reactivated segments.
- List Analytics: Compares growth of engaged contacts against total sends.
Successful recovery typically shows:
- Hard bounce rates below 2 percent
- SPF, DKIM, and DMARC are passing consistently
- Open and click rates are trending upward
- External blocklist tools report the domain or IP as clear
Review these weekly to maintain visibility into sender health.
Short Example That Ties It Together
A B2B SaaS company running outbound marketing in HubSpot experienced a sudden 15% increase in bounce rate. Messages were flagged by spam filters, and open rates dropped sharply. A check using MXToolbox showed the domain listed on two blocklists.
The HubSpot admin paused all sends and reviewed DNS records, uncovering expired SPF entries. After correcting authentication and removing more than 3,000 unengaged contacts using List Analytics, the team moved to a dedicated IP.
Sending resumed with a warm-up schedule targeting previous openers. Within three weeks, bounce rates dropped to 1.8 percent, and both blocklists confirmed delisting. Campaign performance returned to baseline, and the team documented the process to prevent repeat issues.
How INSIDEA Helps
If you want guided recovery, INSIDEA supports teams through every stage of HubSpot blocklist remediation. Our specialists handle technical fixes, list cleanup, and performance tracking so your email program stabilizes faster.
Here is where we help:
- Deliverability audit: Review authentication, bounce patterns, and sending behavior.
- HubSpot onboarding: Set up domains and email infrastructure correctly from day one.
- HubSpot management: Maintain list hygiene, workflow stability, and reporting accuracy.
- HubSpot automation support: Balance lead nurturing with responsible sending volume.
- Reporting and CRM alignment: Keep contact health and engagement visible across teams.
For organizations that need deeper involvement, this is often the point where teams choose to hire HubSpot experts to manage recovery without risking further damage.
INSIDEA also provides structured HubSpot consulting services for teams that want ongoing guidance and oversight as their email program scales.
Get hands-on help fixing your HubSpot email performance today at INSIDEA
Once your messages are consistently reaching the inbox again, your marketing can perform without deliverability holding it back.
