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1. Understanding the Alignment Issue
SPF Alignment: The domain in the MAIL FROM address (the envelope sender) must match the domain specified in your SPF record. DKIM Alignment: The domain in the From address (the address visible to recipients) must match the domain in the DKIM signature.
2. Steps to Fix the Alignment Issue
A. Check MAIL FROM Domain Setup in SES:
Amazon SES allows you to specify a custom MAIL FROM domain. Ensure that the domain you're using matches your DKIM or SPF domain.
In your Amazon SES Console:
- Go to Domains under the SES section.
- Select the domain for which you're configuring the MAIL FROM.
- Verify that you have a custom MAIL FROM domain set up and that it's properly aligned with your verified domain.
B. SPF Record Update: If you haven't done so, create or update your SPF record to allow Amazon SES to send emails on behalf of your domain.
- The SPF record should look something like this:
v=spf1 include:amazonses.com -all - Make sure that the domain in the MAIL FROM header matches the domain in the SPF record. This will fix the SPF alignment issue.
C. Configure a Custom MAIL FROM Domain (Optional):
If you haven’t set a custom MAIL FROM domain yet, you might need to configure one for proper alignment.
In the SES Console:
- Go to Domains.
- Select your domain, then click on Set MAIL FROM Domain.
- Enter a subdomain like mail.yourdomain.com.
- Update your DNS with the appropriate TXT and MX records provided by SES.
- Wait for the status to show as verified.
D. DKIM and DMARC Alignment:
DKIM: Ensure that DKIM is enabled and correctly configured. The domain in the DKIM signature should match your domain (e.g., yourdomain.com).
DMARC: DMARC helps with alignment, as it checks if both SPF and DKIM are aligned. Make sure your DMARC record is set up to monitor alignment issues:
v=DMARC1; p=none; rua=mailto:admin@yourdomain.com
E. DNS Record Verification: Double-check all your DNS settings (SPF, DKIM, and DMARC) using online tools like:
- MXToolbox
- DMARC Analyzer
3. Verify and Test Once you have updated the DNS records:
1- Verify: Wait for the DNS records to propagate (could take a few hours).
2- Test: Send a test email to ensure that the MAIL FROM domain aligns with your SPF and DKIM domains. You can use tools like Mail Tester to ensure that your configuration passes SPF, DKIM, and DMARC checks.
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