It looks like you’re looking for a web app development company. I can certainly help you with that! To ensure your email about course information doesn’t go to spam when sent in bulk, here are a few tips:

1. Use a Recognizable Sender Name: Make sure the sender’s name is recognizable and relevant to the recipients. This increases the likelihood of your email being opened.

2. Avoid Spam Trigger Words: Refrain from using words or phrases that commonly trigger spam filters. These might include terms like “free,” “guaranteed,” or excessive use of exclamation marks.

3. Personalize the Content: Tailor the content of your email to the recipient’s interests or needs. Personalization can reduce the chances of your email being flagged as spam.

4. Avoid Excessive Capitalization: Writing subject lines or content in all capital letters can trigger spam filters. Use capitalization sparingly and appropriately.

5. Use a Clear Call-to-Action (CTA): Clearly state the purpose of the email and what action you want the recipients to take. A clear CTA reduces confusion and increases engagement.

6. Authenticate Your Domain: Implement DKIM and SPF authentication to prove that your email comes from a legitimate source. This can improve your email’s deliverability.

7. Segment Your Email List: Divide your email list into segments based on the recipients’ interests, preferences, or behaviors. This allows you to send targeted emails that are more likely to be well-received.

8. Provide an Unsubscribe Option: Include an easy and visible way for recipients to unsubscribe from your emails. This builds trust and helps you comply with email regulations.

9. Regularly Clean Your Email List: Remove invalid email addresses and recipients who haven’t engaged with your emails for a while. This keeps your list up-to-date and improves deliverability.

10. Test Before Sending: Send test emails to various email providers to check if they land in the inbox or spam folder. Adjust your content if needed before sending to your entire list.

Remember that these are general guidelines and not guaranteed methods to prevent all emails from going to spam. The effectiveness of these tips may vary depending on various factors. Always monitor your email campaigns and adjust your strategy accordingly to achieve the best results.