What This Update Actually Is
HubSpot's email throttling feature isn't new. The ability to slow down a campaign send has existed for a while. What changed is the floor.
Before this update, the minimum send rate was limited. Now you can go as low as 1 email per minute, and you can spread that send across a 10-day window. That's a significant range. It gives you real control over the pace of delivery, not just a rough dial.
This is a public beta update as of April 20, 2026. Every Marketing Hub Professional and Enterprise account gets access automatically. No feature flag request needed.
Why HubSpot Shipped This
Here's the problem the old setup created. When HubSpot sends an email campaign at full speed, it can blast tens of thousands of messages in minutes. For a healthy, engaged list, that's fine. But for re-engagement campaigns, large dormant lists, or anything pointing to a landing page or support channel, full-speed sending can wreck things.
Receiving mail servers get suspicious when they see a sudden surge from a domain. That suspicion shows up as lower inbox placement, or worse, a spam folder spike. Meanwhile, your website might buckle under the traffic, and your support team gets slammed with replies and tickets all at once.
The internal frustration is real. Marketers know slow and steady wins for deliverability, but the old minimum rate didn't go slow enough to matter for sensitive sends. HubSpot closed that gap.
How to Use It Step by Step
Throttling lives inside the scheduling flow for a regular marketing email. Here's exactly where to find it.
- Navigate to Marketing > Email in your HubSpot account.
- Open a drafted regular email (not automated or Blog/RSS) and finish your content, subject line, and recipient selection.
- Click Schedule in the top right and choose your send date and time.
- Expand Advanced Settings within the scheduling panel.
- Select Send more slowly (throttling) to turn the feature on.
- Enter your desired sending rate. You can now go as low as 1 email per minute. The system will not exceed that rate, no matter how large the list.
- Confirm your schedule. HubSpot will distribute the send across up to 10 days based on the rate you set.
One important caveat: if you don't enable throttling, HubSpot sends as fast as possible. There's no default slow-down. You have to opt in each time you schedule a send where pacing matters.
What It Touches in Your HubSpot Strategy
This update is narrowly scoped to regular marketing email sends. But its ripple effect is broader than it looks.
Deliverability and domain reputation sit at the top of the impact list. Receiving servers track sending patterns. A consistent, predictable volume builds trust over time. Erratic spikes erode it. For teams warming up a new sending domain or recovering from a deliverability dip, this level of rate control is a serious tool.
Key Takeaway
Throttling is most powerful for re-engagement campaigns, domain warm-ups, and any send where a sudden traffic spike would hurt your website, support team, or inbox placement.
Website and ops infrastructure is the second area to think about. When a promotional email drops and 50,000 humans click through at the same time, servers strain. Landing pages slow down or time out. That kills conversion rates on campaigns you spent weeks building. Throttling spreads that traffic wave into a manageable stream.
Support and sales team capacity is the third. A re-engagement email to a cold list often triggers a wave of replies, opt-outs, and questions. If your team can only handle 20 inbound conversations per hour, sending 5,000 emails in five minutes sets them up to fail. Throttled sends let humans on your team keep pace with the responses they generate.
Campaign reporting is a quieter but real benefit. When sends are spread over days, you get a longer, more representative performance window before making optimization calls. Open and click rates stabilize instead of spiking on day one and flatting by day two.
Key Takeaway
Throttling only applies to regular (manually scheduled) marketing emails. Automated workflow emails and Blog/RSS emails are not affected by this setting.
If you want to go deeper on how email decisions connect to your overall Marketing Hub setup, the article on adding file downloads without killing deliverability is a practical companion read. Deliverability is a system, not a single setting.
And if you're wondering how this fits into the bigger picture of what HubSpot shipped this month, the April 2026 HubSpot updates roundup covers how all the pieces connect.
Who Should Care Most
This update isn't for everyone every day. But it's critical for specific scenarios.
- Email marketers running re-engagement campaigns to lists that haven't received email in 90 or more days. Mailbox providers treat sudden volume to cold addresses as a red flag. Slow-rolling that send protects your sender score.
- Marketing ops leaders managing domain warm-up after a migration or a new subdomain launch. The 1 email/min floor gives you precise control during the most sensitive phase of a new sending setup.
- Small and mid-size teams where one or two humans handle all inbound replies and customer conversations. Throttling keeps the reply volume manageable and prevents a good campaign from becoming a service bottleneck.
- E-commerce and event-driven marketers whose landing pages or checkout flows can't handle a sudden traffic surge. Spreading the send across hours or days protects conversion infrastructure.
- RevOps leaders auditing their email program health. If your portal has never used throttling and you send to large lists, this is worth adding to your next HubSpot portal audit checklist review.
George's Take
I've seen this pattern in portal after portal: a well-intentioned campaign goes out at full blast, deliverability takes a hit, and then the team spends the next 60 days wondering why open rates dropped. They blame the content. They blame the subject line. The real culprit was the send pattern. The expanded throttle range, especially that 1 email per minute floor, is the kind of quiet infrastructure upgrade that doesn't get enough attention. It won't win a product announcement award. But for the humans running large lists or warming up a new domain, it's one of the most practically useful controls HubSpot has ever put in this part of the product.
“The teams that protect deliverability aren't the ones with the cleverest subject lines. They're the ones who treat sending infrastructure like it matters, because it does.”
If you want a second set of eyes on your email sending setup, your domain health, or your overall Marketing Hub configuration, the Sidekick team is ready. We've reviewed hundreds of portals and we know exactly where the hidden deliverability risks tend to hide. Book a strategy call and let's look at what's actually happening in your portal.
Frequently Asked Questions
What is email throttling in HubSpot?
Email throttling in HubSpot lets you control how quickly a marketing email campaign is delivered. Instead of sending all messages at once, you set a maximum send rate. HubSpot will not exceed that rate. The updated feature supports rates as low as 1 email per minute across a window of up to 10 days.
Who can use HubSpot email throttling?
Email throttling is available to Marketing Hub Professional and Enterprise accounts. As of April 2026, it's in public beta, meaning all qualifying accounts get it automatically with no feature request needed. It applies to regular marketing email sends only, not automated workflow emails or Blog/RSS emails.
How does email throttling improve deliverability?
Sending emails at a consistent, controlled rate helps receiving mail servers recognize your domain as a trustworthy sender. Sudden volume spikes can trigger spam filters and hurt inbox placement. Throttling creates a steady pattern that builds sender reputation over time, which is especially valuable during re-engagement campaigns or domain warm-ups.
What is the minimum email send rate in HubSpot's throttle feature?
As of the April 2026 update, the minimum send rate is 1 email per minute. Combined with the 10-day sending window, this gives you the flexibility to pace very large or sensitive campaigns far more slowly than was previously possible in HubSpot.
When should I use email throttling in HubSpot?
Use throttling when sending re-engagement campaigns to dormant lists, warming up a new sending domain, promoting an offer that will drive heavy website traffic, or running campaigns where your support or sales team needs time to handle incoming replies. Any send where a sudden spike would cause problems is a good candidate.
Does HubSpot throttle emails by default?
No. If you don't enable throttling, HubSpot sends your campaign as fast as possible. Throttling is an opt-in setting found under Advanced Settings when scheduling a regular marketing email. You need to turn it on and set a rate for each send where pacing matters.
