To ensure that your bulk emails containing course information do not go to spam, you can follow these best practices:

1. Authentication and SPF/DKIM/DMARC Setup: Set up SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance) records for your domain. This helps email providers verify that your emails are legitimate and not spoofed.
2. Use a Trusted Email Service Provider: Consider using reputable email service providers like Amazon SES (Simple Email Service) if you send emails through AWS. These services are designed to handle bulk emails and have reasonable deliverability rates.
3. Quality Content and Avoiding Spam Triggers: Craft your emails with relevant and engaging content. Avoid using excessive capitalization, too many exclamation marks, and spam trigger words (e.g., “earn money fast,” “guaranteed,” etc.) that could trigger spam filters.
4. Maintain a Clean Email List: Regularly clean your email list by removing invalid or inactive email addresses. Sending emails to static or incorrect addresses can increase your chances of being marked as spam.
5. Segmentation and Personalization: Segment your email list based on user preferences or demographics. Personalized emails are less likely to be flagged as spam and are more likely to engage recipients.
6. Opt-In Subscriptions: Ensure your recipients have opted in to receive your emails. Sending emails to people who haven’t explicitly given consent can result in spam complaints.
7. Provide Unsubscribe Option: Include an easy-to-find unsubscribe link in your emails. This helps build trust and compliance with anti-spam regulations.
8. Regular Sending Patterns: Avoid sudden spikes in email volume. Gradually ramp up your email sending to establish a consistent sending pattern, which can reduce the likelihood of being marked as spam.
9. Monitor and Analyze: Keep track of your email metrics, such as open rates, click-through rates, and bounce rates. Analyzing these metrics can help you refine your email campaigns and improve deliverability.
10. Feedback Loop: Set up a feedback loop with major email providers to receive reports on complaints and bounces. This can help you identify and address issues quickly.