How to Keep Your Emails Out of the Spam Folder
How to Keep Your Emails Out of the Spam Folder
Short answer: Keep email out of spam by authenticating your sending domain with SPF, DKIM and DMARC, sending only to people who asked for it, making unsubscribing easy, keeping spam complaints low and cleaning your list. Gmail and Yahoo published stricter rules for bulk senders in 2024, so check their current requirements.
Whether a message lands in the inbox or the spam folder is decided mostly before anyone reads it. Mailbox providers look at who sent it, whether the sender can be verified and how recipients have reacted to your earlier mail.
That means deliverability is something you build over time, and the same habits that help you reach the inbox also keep you on the right side of customers.
Inbox placement is earned by every email you sent before this one.
Below are the steps that matter most. They apply whether you send a newsletter or a million transactional emails.
Authenticate your domain: SPF, DKIM and DMARC
SPF lists which servers may send mail for your domain. DKIM adds a cryptographic signature that proves the message was not altered. DMARC tells receivers what to do when SPF or DKIM fails and gives you reports. Your email provider will give you the records to publish in your domain's DNS.
Meet the bulk sender rules
In 2024 Google and Yahoo began enforcing requirements for senders of large volumes: authenticate with SPF and DKIM, publish a DMARC policy, offer one-click unsubscribe on marketing mail, and keep spam complaint rates low. Read Google's and Yahoo's own guidance for the current thresholds, which can change.
Send to people who want it
Use opt-in sign-ups, record when and how people subscribed, and never buy lists. Mail to uninterested recipients produces complaints and spam traps, which hurt every later send.
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Make unsubscribing easy and honour it quickly
A visible unsubscribe link and a one-click option reduce the chance that people press the spam button instead. Remove unsubscribed addresses promptly.
Clean your list and warm up new senders
Remove hard bounces and addresses that never engage. When you start on a new domain or IP address, begin with small volumes to your most engaged contacts and increase gradually.
Write like a person, not a filter trigger
Use a clear subject line that matches the content, a recognisable sender name and one main call to action. Avoid all-caps and misleading claims. Test with seed addresses before big sends.
Want this running for your own business? Explore our Email Messaging or talk to our team to get started.
Frequently Asked Questions
What are SPF, DKIM and DMARC?
SPF lists servers allowed to send for your domain, DKIM signs messages to show they were not altered, and DMARC sets what receivers do when those checks fail and reports back to you.
Why do my emails go to spam?
Common causes are missing authentication, a poor sender reputation from complaints or bounces, sending to unengaged lists and misleading content.
Do I need one-click unsubscribe?
Gmail and Yahoo require it for marketing mail from bulk senders. Check their current guidance.
Can I buy an email list?
No. Purchased lists cause complaints and spam traps and damage your sender reputation.
How long does it take to build sender reputation?
It varies. Start with small, engaged volumes and increase gradually while you watch bounce and complaint rates.
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