Custom domain emails usually go to Gmail spam because your domain lacks essential email authentication records: SPF, DKIM, and DMARC. Google requires these DNS records to verify that you are the legitimate sender and not a spammer spoofing your address. To fix this, log into your registrar and add the missing TXT authentication records provided by your email host.
The War on Spam: Google's 2024 Requirements
In 2024, Google and Yahoo implemented strict sender authentication requirements. Emails from domains without proper DNS records are now flagged or rejected outright.
Two types of spam filtering:
| | |
| Spammy words, excessive links, ALL CAPS | |
| Missing SPF/DKIM/DMARC records | |
Critical distinction: Even perfectly written emails go to spam without technical authentication. Your content doesn't matter if Google can't verify you're legitimate.
The new rules target spoofing and phishing. If your domain can't prove it authorized an email, Gmail treats it as suspicious by default.
Root Cause 1: Missing Authentication Records
The "holy trinity" of email deliverability:
SPF (Sender Policy Framework): Tells receiving servers which IPs can send email for your domain. Without it, anyone can claim to send as you.
DKIM (DomainKeys Identified Mail): Adds cryptographic signatures proving emails weren't tampered with in transit.
DMARC (Domain-based Message Authentication): Instructs servers what to do when SPF/DKIM fail—and sends you reports.
All three are required for reliable Gmail delivery. Missing even one causes problems.
Your email provider (Google Workspace, Microsoft 365, Zoho) supplies these records. You must add them to your domain's DNS.
Root Cause 2: Cold Domain Reputation
Even with perfect authentication, new domains face suspicion.
Domain age matters: A domain registered yesterday has zero reputation. Gmail doesn't know if you're legitimate or a spammer who burns domains.
Volume triggers: Sending 500 emails from a new domain screams "spam operation." Legitimate senders build gradually.
Warm-up period: Start with 10-20 emails daily, increase slowly over weeks. This builds a positive reputation with mail providers.
Shared IP risk: Cheap email hosting shares IP addresses with other users. If they spam, your emails suffer guilt by association.
Root Cause 3: Mail Provider Filters
Beyond authentication, providers maintain proprietary filters:
Engagement signals: Gmail tracks opens, replies, and spam reports. Low engagement hurts deliverability.
Content patterns: Certain phrases and link ratios trigger filters regardless of authentication.
Reputation databases: Getting marked spam at one provider affects others.
Building reputation takes weeks to months of consistent, authenticated sending.
Implementation Steps: Fix Your Authentication
Step 1: Test current status at mail-tester.com. They identify exactly what's failing.
Step 2: Get SPF, DKIM, and DMARC values from your email provider.
Step 3: In NameSilo DNS Manager, add SPF TXT record for @.
Step 4: Add DKIM TXT record (hostname like google._domainkey).
Step 5: Add DMARC TXT record for _dmarc (start with p=none).
Step 6: Retest. My score should improve dramatically.
Common Mistakes
Skipping DKIM: SPF alone isn't enough post-2024. You need all three.
Using shared "dirty" IPs: Bargain hosting shares infrastructure with spammers.
Blasting emails immediately: New domain + high volume = instant spam classification.
Ignoring forwarding: Email forwarding breaks SPF. Avoid critical sends.
What This Means for You
NameSilo's DNS Manager handles all authentication record types. Add SPF, DKIM, and DMARC as TXT records with full validation.
For professional email at your domain, explore NameSilo Email with proper authentication built in. Frequently Asked Questions
Why are my emails going to junk?
Missing SPF/DKIM/DMARC or poor domain reputation.
DNS record listing authorized sending servers.
How do I stop emails from going to spam?
Add authentication records, warm up gradually.
Does Gmail block new domains?
Not blocked, but treated with suspicion initially.
Gradually increasing volume to build reputation.
How do I check if my domain is blacklisted?
Use MXToolbox or mail-tester.com.
Do I need DKIM and DMARC?
Yes. Google requires all three.
Why does forwarding trigger spam filters?
Forwarding breaks SPF alignment.
.png&w=3840&q=75)
.png&w=2048&q=75)
