HubSpot Email Marketing: How to Build Campaigns That Get Opened and Drive Revenue

Despite consistent predictions of its decline, email remains the highest ROI marketing channel in B2B. A well-built email program touches every stage of the revenue funnel: attracting new contacts, nurturing leads through the buying process, accelerating deal velocity in the pipeline, and keeping existing customers engaged through renewal and expansion cycles.

HubSpot's email marketing tools span Marketing Hub for campaign-level sends and Sales Hub sequences for one-to-one sales outreach. Understanding which tool to use when, and how to build each effectively, is the foundation of a HubSpot email program that produces revenue rather than open rate statistics.

The Three Types of B2B Email That Drive Revenue

Nurture Emails

Nurture emails are automated series that move a contact from awareness to consideration to decision over time. They are enrolled by workflow based on a trigger: a form submission, a lifecycle stage change, or a specific content download. The best nurture emails in B2B are not promotional. They deliver useful information that helps the buyer understand their problem and the landscape of solutions more clearly. A five-email nurture for a new contact who downloaded a guide on CRM implementation might look like:

1. Day 0: Deliver the guide with a brief framing of the problem it addresses
2. Day 3: A related article on the most common mistakes in CRM implementation
3. Day 7: A customer story showing how a similar company solved the problem
4. Day 14: A comparison of approaches (DIY vs. consulting partner) with honest trade-offs
5. Day 21: A direct CTA to book a call or get a free audit

Campaign Emails

Campaign emails are one-time sends to a segmented list for a specific purpose: a product announcement, a webinar invitation, a seasonal promotion, or a content launch. The key difference from nurture is that campaign emails are often sent to a broader list rather than a behavior-triggered segment. Because of this, segmentation becomes critical. Sending a campaign about HubSpot Sales Hub to your entire list, including Marketing Hub-only customers and people who have never expressed interest in sales tools, is a fast way to increase unsubscribes and decrease deliverability.

In HubSpot, before sending any campaign email, define the active list you will send to: who are the contacts for whom this message is relevant, and who should be excluded? That segmentation step is more important than the subject line.

Re-Engagement Emails

Contacts who have not opened an email in 90 days are a deliverability risk. Gmail and Outlook measure engagement signals from your sends, and consistently sending to contacts who never open eventually causes your emails to land in spam for everyone. A re-engagement workflow identifies contacts who have not opened in 90 days and sends a short, direct email: "We noticed you have not opened our emails in a while. Are you still interested in [topic]? Click here to stay subscribed or let us know if you would like to unsubscribe." Contacts who do not engage with the re-engagement email are suppressed. This keeps your list healthy and your deliverability scores high.

Deliverability: The Foundation Everything Else Depends On

A beautiful email that lands in spam generated zero pipeline. Deliverability in HubSpot depends on three layers:

Technical Setup

Before sending any marketing email from HubSpot, verify that your domain has:

• SPF record: Authorizes HubSpot's servers to send email on your domain's behalf
• DKIM record: Cryptographically signs outbound emails to verify authenticity
• DMARC record: Tells receiving mail servers what to do with emails that fail SPF or DKIM checks

HubSpot provides the required DNS records in Settings under Email. These should be in place before you import any contacts and before you send your first campaign. Sending without proper authentication is the fastest way to damage your domain reputation permanently.

List Quality

Only email contacts who have opted in to receive email from you. In practice this means contacts who filled out a form, signed up for a newsletter, or explicitly agreed to marketing communications. Purchased lists, scraped lists, and contacts added without consent will produce high bounce rates and spam complaints that damage your domain's sending reputation in ways that are difficult to reverse.

Engagement Segmentation

Gmail, Outlook, and other email clients measure how recipients interact with your emails. If you consistently send to a segment with low open rates, the algorithm assumes your emails are not valuable and routes them to spam for an increasing percentage of your list. The fix is to send more frequently to engaged contacts (those who have opened in the last 60 days) and less frequently to unengaged contacts while running re-engagement sequences for anyone approaching 90 days without an open.

What to Measure in HubSpot Email Marketing

HubSpot's email analytics track open rate, click rate, click-to-open rate, unsubscribe rate, bounce rate, and spam reports at both the campaign and individual email level. The metrics that actually matter for revenue are:

• Click-to-open rate (CTOR): The percentage of people who opened your email and then clicked. This measures the quality of your content and CTA independent of subject line performance. A high open rate with a low CTOR means the subject line got attention but the body did not deliver.
• List growth rate: Are you adding more new subscribers than you lose to unsubscribes and suppressions? A flat or declining list means your top-of-funnel is not working.
• Email-influenced pipeline: What is the total value of open deals where the contact had at least one email touchpoint in the last 90 days? This is the metric that connects email activity to revenue. Build it in HubSpot using a custom report that joins deal data to email engagement data.
• Bounce rate by campaign: Hard bounce rates above 2 percent for any send indicate a list quality problem that needs immediate attention before your next campaign.

Open rate, while visible and tempting to optimize for, is not a revenue metric. Apple Mail Privacy Protection has made open rate unreliable as a signal. Use CTOR and email-influenced pipeline as your primary performance indicators. Those two numbers tell you whether your emails are compelling and whether they are producing pipeline worth closing.