Why Your Emails Are Not Being Delivered (And How to Fix It)
May 6, 2025 | 2 min read
You’ve spent time crafting the perfect email only to find out it landed in the junk folder. Frustrating? Absolutely.
But you’re not alone. Millions of legitimate emails are flagged every day due to misconfigured authentication, missing DNS records, or poor sender reputation.
Let’s break down why this happens and how to fix it fast with Skysnag.
The Real Reasons Emails Go to Junk
1. You’re Failing DMARC, SPF, or DKIM Checks
Email providers like Microsoft, Google, and Yahoo check your emails against authentication protocols. If even one fails, your email might get marked as suspicious.
- SPF confirms you’re authorized to send on behalf of the domain.
- DKIM ensures your message hasn’t been tampered with.
- DMARC ties it all together and enforces sender alignment.
If any of these are missing, misaligned, or broken -your email may go straight to junk.
2. You’re Not Aligned with Microsoft’s May 2025 Policy
Starting May 5, 2025, Microsoft began rejecting emails that don’t meet strict authentication standards. If your domain doesn’t pass DMARC aligned with SPF or DKIM, you might see this error:
550 5.7.515 Access denied, sending domain [YourDomain] does not meet the required authentication level.
Even if your message isn’t rejected outright, it’s likely to land in spam.
3. Your Sender Reputation Is Poor
Even with valid records, email providers also factor in:
- Spam complaints
- Bounce rates
- Sending history
If you’re sending bulk emails from a domain with a weak reputation, you’ll likely hit the junk folder.
4. Your Content Triggers Spam Filters
Sometimes it’s not your setup -it’s your content.
- All caps or excessive exclamation marks
- Misleading subject lines
- Links to suspicious URLs
These are common red flags for spam filters.
How to Fix It (The Right Way)
Step 1: Run a Free Authentication Check
Use Skysnag’s 30-second compliance scanner to identify gaps in your domain setup.
Step 2: Configure SPF, DKIM, and DMARC Properly
Skysnag automates your entire email authentication stack:
- Sets up and aligns SPF records
- Generates, rotates, and monitors DKIM keys
- Publishes and updates DMARC policies
- Detects broken rua and ruf destinations
- Flattens SPF to prevent DNS failures
Even if you use multiple sending platforms (e.g. Mailchimp, Google Workspace, SendGrid), Skysnag ensures they all pass authentication cleanly.
Step 3: Monitor and Maintain
Once configured, stay ahead of issues with:
- Daily DMARC reports across providers
- Alerts for unauthorized IPs
- Compliance summaries
- Microsoft- and Google-specific policy support
Why It Matters
Email is the backbone of your business communication. When messages end up in spam – or don’t arrive at all – you risk losing deals, damaging trust, and weakening your brand reputation.
By authenticating your email infrastructure with Skysnag, you’re not just improving deliverability – you’re protecting your brand.
