Why Emails Go to Spam
Email providers like Gmail, Outlook, and Yahoo use sophisticated filters to protect users. Your email can land in spam because of:
1. **Missing DNS authentication records** (SPF, DKIM, DMARC)
2. **Sending from a shared IP** with a poor reputation
3. **Spam trigger words** in your subject line or body
4. **Low engagement rates** (recipients deleting without opening)
5. **No unsubscribe link** in marketing emails
6. **Sending to invalid email addresses** (high bounce rate)
7. **Your domain or IP is blacklisted**
Step 1: Check Your DNS Authentication (Most Common Fix)
### SPF Record
SPF tells receiving servers which mail servers are allowed to send on behalf of your domain.
Check if you have one:
```
dig TXT yourdomain.com
```
You should see something like:
```
v=spf1 include:_spf.google.com ~all
```
If missing, add an SPF TXT record in your DNS:
```
v=spf1 include:yourmailserver.com ~all
```
### DKIM Record
DKIM adds a cryptographic signature to your outgoing emails, proving they haven't been tampered with.
For Google Workspace: Admin Console → Apps → Gmail → Authenticate Email → Generate DKIM key → Add the TXT record to your DNS.
### DMARC Record
DMARC tells receiving servers what to do with emails that fail SPF or DKIM checks.
Add this TXT record (`_dmarc.yourdomain.com`):
```
v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com
```
Step 2: Check Blacklists
Use [MXToolbox Blacklist Check](https://mxtoolbox.com/blacklists.aspx) to check if your domain or IP is on any spam blacklists. If listed, follow the removal instructions on the blacklist provider's site.
Step 3: Improve Your Sending Practices
- **Warm up new domains** — Start with low volume and increase gradually
- **Clean your mailing list** — Remove bounced and unengaged addresses regularly
- **Use a reputable sending IP** — Microsoft 365 and Google Workspace have excellent IP reputations
- **Avoid spam trigger words** — "FREE", "URGENT", "Act now", "Click here" in subject lines
- **Always include plain text** — Send both HTML and plain text versions
Step 4: Test Before Sending
Use [mail-tester.com](https://www.mail-tester.com) — it gives your email a score out of 10 and explains every issue in plain English. Send a test email to the address provided and review the report.
Step 5: Use a Dedicated SMTP Service for Marketing Emails
For bulk or marketing emails, use a dedicated service rather than your hosting server:
- **Mailgun** — Pay-as-you-go, excellent deliverability
- **SendGrid** — Free up to 100 emails/day
- **Amazon SES** — ₹0.10 per 1,000 emails
webzworld can audit your email configuration and fix SPF, DKIM, and DMARC records for you. Raise a support ticket with "Email Deliverability Audit" in the subject.