- Check that your domain has SPF, DKIM and DMARC records — see SPF, DKIM and DMARC.
- Always send email through your own mail server (via SMTP); use an SMTP plugin instead of the site’s
mail()function. - Avoid all-caps subject lines, lots of exclamation marks and words like “FREE” or “WIN”.
- Don’t use a regular mailbox for bulk mailings — it can get the server blacklisted.
- Check your email’s score on Mail-tester.com.
If incoming mail lands in spam, you can adjust sensitivity and the whitelist under E-mail Manager → Spam Filters in DirectAdmin.
