Here are the best ways to stop emails from being put in the junk mail folder:
1. Add an SPF Record
Sender Policy Framework (SPF) records help verify that emails from your domain are legitimate. Add an SPF record in your DNS settings.
2. Add a DKIM Record
DKIM (DomainKeys Identified Mail) adds a digital signature to your emails, helping receiving servers verify they are genuine.
3. Use authenticated SMTP
Always send emails via authenticated SMTP over an SSL/TLS connection rather than PHP Mail.
4. Check if your domain is blacklisted
Use an online tool such as mail-tester.com to check your domain reputation and test your emails.
5. Avoid spam trigger words
Review your email content and subject lines for words commonly flagged by spam filters.