Series Edition: Section 1 - The Basics

Why Your Emails Might Be Going to the Spam Folder

A Stat That Should Scare You

The thing is, 1 in 6 actual emails never makes it to the inbox.

Not spam, not wrong addresses, actual emails from actual companies to actual people who opted in to receive them. Poof, gone!

If you've ever sent 1,000 emails in the past month, you've probably already lost 170 of them to the spam folder or bounced before anyone ever sees them. If you've ever sent 100,000 that's 16,900 emails that no one will ever read.

And the worst part is, you probably don't even know it's happening!

Most people look at their email reports and they say, "Sent: 10,000 | Delivery Rate: 99%." But that 99% "delivered" rate doesn't tell you if they were delivered to the actual inbox or the actual spam folder. That's two totally different results.

So... What Even IS Email Deliverability?

Email deliverability is a simple idea, but messy in practice:

It's the question of whether your emails actually show up in people's inboxes, not spam folders, not promotional folders, not nowhere folders.

That's it. That's the whole idea.

Deliverability is not about getting your email out the door from your server. You can send an email with no problem, but it can end up in a spam folder. Deliverability is the difference between "sent" and "seen."

Here's a way to think about it:

Sending an email is like putting a letter in the mail. Deliverability is like getting it delivered to the doorstep, rather than the junk mail heap.

Deliverability vs. Inbox Placement: What's the Difference?

This is where a lot of confusion happens. These two terms get used interchangeably, but they're not the same thing.

So, here’s the real talk: a 99% delivery rate means nothing if only 75% of those emails get into the inbox. You’re celebrating your emails making it to the mail server while your revenue opportunities are in the spam folder.

Why Should You Even Care?

Because it impacts your business in three ways:

1. Revenue loss before anything else happens

If 17% of your emails don't make it to your customers' inboxes, that's 17% of your sales, customers, sign-ups, or engagement that just... disappears. Before they even see your email, before they decide to not buy from you, before anything, and nothing happens. That's money on the table that you'll never see.

2. Your sender reputation gets damaged

ISPs (Gmail, Outlook, Yahoo, and so on) monitor your email performance. If people are ignoring your emails, deleting your emails, and marking your emails as spam, an ISP will be thinking: "This email sender is not trustworthy." And the worse your reputation gets, the stricter their spam filters will be on your emails. So, your best emails will end up in spam because an ISP already determined that you're a suspicious email sender.

3. Trust is lost, and it happens quietly with each unseen email

Your customers will unsubscribe from your emails because they never see your emails in their inboxes. Your open rates will be terrible. Your team will wonder if email marketing is even working anymore. Meanwhile, email deliverability is quietly slipping under the radar.

The Chaos Part: Dozens of Systems Are Judging Your Emails

Here's where it gets crazy.

Because when you hit "send" on that email, it doesn't go directly to that person's inbox. Before that happens, it has to go through dozens of invisible checks and filters, all at the same time, all with different rules.

Gmail's got its own algorithm. Yahoo's got its own rules. Outlook's got its own rules – and they're all totally different. And then there are all the authentication systems like SPF, DKIM, and DMARK (don't even get me started on those).

Then there's your reputation score as a sender, and your domain's reputation score, and how many people are actually engaging with your emails, and whether or not you're accidentally sending spam keywords in your content...

And that's still not even all of it.

Each one of these email providers has its own way of doing things, its own way of weighing all these different variables and determining whether to deliver your email.

It's chaos. Beautiful, algorithmic, invisible chaos.

But here's the good news: it's not random chaos.

There are patterns and rules and things that you can control.

And that's what this whole series is about.

The Real Question

Before we delve deeper into who and what is responsible for checking your emails, ask yourself:

Do you know what percentage of your emails actually land in the inbox today?

Not sent. Not delivered. Land in the inbox. Where actual humans can see them.

If you don't know the answer to this question, it's totally fine. You're not alone. Most teams don't track it until something goes wrong. But the space between "sent" and "seen" is where all your problems reside.

In the next section, we'll be introducing you to the unseen actors in your email's journey: the ISPs, spam filters, authentication protocols, and algorithms working together to determine your email's fate.

Spoiler alert: it's going to change everything.

Key Takeaway

Email deliverability is the space between sending an email and it arriving in someone’s inbox. The sad truth is that 1 in 6 legitimate emails never makes it to the inbox, which means revenue and engagement are slipping through your fingers before you ever get a chance to engage with them in the first place. And it’s not because of any one thing, it’s a system of invisible checks and filters all working together to pass judgment on every single email you send. The good news is, it’s all based on a system of rules, and understanding them is the first step to winning at email.

Running a campaign or managing an organization is no small feat—but your tools shouldn’t make it harder. Whether you're launching a local city council race, powering a nonprofit initiative, or juggling multiple clients as a political consultant, Campaign Nucleus is here to help you work smarter, not harder.

We get a lot of great questions from folks who are new to Nucleus, so we’ve pulled together some of the most common ones to give you a quick, helpful overview of what to expect (and why people love it).

Does Campaign Nucleus integrate with other platforms?

Absolutely. Nucleus is built to eliminate data silos and make your work more efficient. We support integrations with a wide range of third-party tools including:

• Payment processing

• Data enrichment

• Peer-to-peer texting

• SMS deliverability

• Voter files and more

If there's a platform you're already using, chances are we integrate with it—or we can explore a custom solution to make it work for you.

How much does Campaign Nucleus cost?

It depends on your organization’s size and needs. We offer flexible pricing plans tailored to campaigns, nonprofits, agencies, and advocacy groups. The best way to get accurate pricing is to schedule a quick demo with our team, where we’ll learn more about your goals and recommend the right plan for you.

How long does it take to get set up?

You can get started quickly. Many teams are fully operational within a few days. Setup time depends on the complexity of your workflows and data migration, but we make it simple by pairing you with a dedicated onboarding specialist who will walk you through every step of the process.

Can I manage multiple teams or campaigns within Nucleus?

Yes—Nucleus is built for scale. Our Agency feature is ideal for consultants, firms, or any organization managing multiple campaigns or entities. With this tool, you can:

• Oversee multiple accounts from one dashboard

• Switch between clients seamlessly

• Control branding, user permissions, and reporting

All while maintaining visibility and organization at every level.

Ready to See Nucleus in Action?

Campaign Nucleus is more than just campaign software—it’s your partner in strategy, outreach, and growth. Whether you’re building your first campaign or managing a statewide operation, we’re here to help you launch with confidence and scale with ease.

By Julia, Deliverability Expert

“I don't want no scrub, a scrub is an email that can't get no love from me.”

Here at Campaign Nucleus, we want to make it as easy as possible for our users to produce the most successful email content possible. With that our team has done some research and put together some information we’ve found helpful in creating our own emails.

Let’s start simple – what are the things that every recipient is going to notice about your email?

1. Your sender
2. Your subject line
3. Your content

Now let’s talk about how we can utilize all 3 of these factors to create the MOST TOP NOTCH EMAIL possible!!

Sender:

When you see an email in your inbox, what is the first thing you see? Likely, the sender’s name. Are you more likely to open an email that appears to be sent from a specific person or one that declares a corporation. Likely, a specific name.

Well, your audience feels the same. This means you can improve your user engagement simply by using a more personalized sender, such as a team member, to make your communications seem more “human”and less “AI generated.”

For example, an email being sent from Julia from Nucleus may perform a bit better than one being sent from the Biden Administration (although that may have more than one reason for performing poorly…).\

With that, consistency is also always key – it’s a good habit to keep one sender and domain affiliated with each type of content being sent.

Subject Line:

Following the sender, you likely immediately notice the subject line affiliated with the email.

When it comes to subject line, there are a couple things to keep in mind:

• Topic – always make sure your subject line sticks to the point. No one wants to open an email that has nothing to do with the subject line… it appears deceiving

• Length – your subject line length can actually drive your engagement. Short subject lines (below 50 characters) & longer subject lines (above 70 characters) actually have been found to receive more engagement than average-length subject lines.
  

Content:

The last thing the recipient will see but generally the most important portion of the email for them to see.

There are lots of considerations to be made when designing our content & every audience type responds differently to different copy types.

We encourage individuality in your sends but here are a few things to keep in mind:

• Be concise – the average human has a reading attention span that ranges from 10-15 seconds… that isn’t very long.

• Consider your call to action – it’s good practice to include multiple links within the email & our system makes it easy to determine where your audience is engaging the most within your email.
  

• Always check variables – we want to make sure we do not address our recipients as “Hello %recipient.first%.”

• Make your email readable – this includes but is not limited to:
  • Having a nice layout – easy to read & pictures should never outweigh text
  • Using color and branding wisely
  • Ensuring pictures are high enough quality that they engage your audience (although too much data can slow your email load time & that isn’t great either)

For more information be sure to contact our team for training or insight and visit your Nucleus Resource Library!

OR

By Julia, Deliverability Expert

At Nucleus, we understand that it can be hard to put a schedule on hard-hitting news. But, did you know that utilizing consistency in your email practices can actually help to improve your sender reputation?

The WHY:

By remaining uniform in certain areas of your email sending, you allow yourself to become more recognizable to both the recipients & the server. This makes it much more likely for recipients to remain engaged in your email content.

The HOW:

Some ways we can apply this method are as follows: