You’ve got the subject line ready, the copy tested, and the CTA in place, and everything looks great, but your email still lands in the spam folder. It’s one of the most frustrating things for any marketer.
Spam folder placement isn’t just a minor technical inconvenience. It means lost engagement and lost revenue. The good news, however, is that it’s preventable.
In this article, we’re going to discuss the main reasons why your emails might be landing in the spam folder and how you can prevent your emails from landing there.
Why do emails go to spam?
It’s a common misconception that emails go to spam because of the content of the email. While email content certainly plays a role, your emails often land in spam because of how mailbox providers perceive you and rate your domain reputation.
Mailbox providers like Gmail, Outlook, and Yahoo assess your sending behavior over time and assign a reputation to your domain. They then use this reputation to decide if your emails should land in the inbox folder or in the spam folder.
Now, your domain reputation is shaped by a few factors. They are:
- Spam complaints from recipients
- Bounce rates
- Engagement levels (opens, clicks)
- Email authentication protocols
So, even if your content is well-written and your email is well-designed, a poor domain reputation can get your emails flagged every single time.
Why most email deliverability fixes fall short
When deliverability issues hit, many marketers try superficial fixes in anticipation that their next email will land in the inbox folder. They usually try:
- Changing the subject line
- Tweaking the HTML template
- Resending at a different time
But these are rarely enough. You’re only making surface-level changes and that doesn’t result in anything meaningful.
That’s where Mailmodo helps you. Let’s check out how.
How to prevent spam placement using Mailmodo
Mailmodo offers powerful features that directly reduce the chances of your emails being flagged as spam. Here’s how you can use Mailmodo to fix your deliverability issue.
1. Maintain a clean and compliant email list
Spam complaints can be very harsh on your reputation. The best way to prevent spam complaints is to only email people who actually want to hear from you.
Here’s how Mailmodo helps in that:
- Remove inactive users: Remove contacts who haven’t opened in months. Mailmodo lets you filter and delete low-engagement contacts easily.
- Use forms to collect consented leads: Mailmodo's built-in signup forms ensure leads opt-in explicitly, helping you stay compliant and lower complaint rates.
- Stop emailing unsubscribed and blocked recipients: Mailmodo automatically stops sending emails to recipients who have unsubscribed from your emails or are unreachable due to hard or soft bounces.

2. Monitor bounce rates proactively
Every email campaign you send in Mailmodo includes detailed performance metrics — including bounce rates and unsubscribes.
You must ensure that you’re not seeing a very high bounce or unsubscribe rate. That would suggest that something is wrong with either the email you’re sending or the list of recipients you’re sending to.
3. Warm up your domain before sending at scale
If you’ve just started sending emails from a new domain, your email sending behavior is going to be marked as suspicious if you start sending large amounts of email all of a sudden.
Mailmodo helps you here by helping you warm up your domain to prevent coming across as spammy. Mailmodo’s warm-up feature allows you to schedule your email campaign such that the volume of emails sent every day starts small and increases gradually with time.
4. Authenticate your domain
Email authentication is one of the strongest signals you can send to inbox providers. This is why Mailmodo makes it highly important that you set up their protocols before you start sending email campaigns.
Mailmodo even allows you to manage multiple sender domains as well as verify your DNS records. This allows the mailbox providers to be sure that you’re a legitimate sender and are less likely to be marked as spam.

Conclusion
Spam folder placement isn’t a minor issue. It’s a silent campaign killer. But it’s not random. It’s predictable and, more importantly, preventable.
Mailmodo gives you the tools you need to improve your email deliverability. When you start using these features, you stop guessing and start getting results. So if you’re suffering from email deliverability issues, try Mailmodo for free today.



