Selenium WebDriver in JavaScript. To ensure your bulk emails do not go to spam, you need to follow best practices and adhere to email sending guidelines. Selenium WebDriver can be used for web automation, but it doesn’t directly address email sending issues.

To avoid having your emails marked as spam when sending them in bulk, consider the following tips:

1. Use a reputable email service: Choose a well-known email service provider that has a good reputation for email deliverability. Popular options include SendGrid, Mailchimp, or even using SMTP with a reputable email server.

2. Authenticate your domain: Implement SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) records for your domain to prove the legitimacy of your email sending server.

3. Use dedicated IPs: If you’re sending a high volume of emails, consider using dedicated IP addresses to avoid being associated with spammers on shared IPs.

4. Segment your email list: Divide your email list into smaller, targeted segments based on user preferences, behavior, or demographics. Sending relevant content to the right audience can reduce spam complaints.

5. Clean your email list: Regularly remove invalid or inactive email addresses from your list to improve your sender reputation.

6. Send engaging content: Create engaging and valuable email content that recipients want to read. Avoid using spammy keywords and excessive use of images or links.

7. Opt-in and unsubscribe options: Always provide clear opt-in options and an easy way for recipients to unsubscribe from your emails. Compliance with email marketing regulations like CAN-SPAM Act or GDPR is crucial.

8. Monitor email deliverability: Keep an eye on your email campaign performance and adjust your strategies based on open rates, click-through rates, and spam complaints.

9. Avoid spam traps: Be cautious of purchasing email lists or scraping email addresses from the internet, as this can lead to sending emails to spam traps.