Validate Email Domain via MX Record During Signup

To improve data quality and protect our email infrastructure, I recommend adding a domain-level validation check for MX records during user registration.

Problem:

Currently, users can register with email addresses from domains that do not have valid MX records, meaning email delivery is not possible. This leads to:

• High bounce rates from welcome emails and system notifications.

• Increased risk of blacklisting and damage to sender reputation.

• Clogged databases with invalid or fake accounts.

Proposed Solution:

Implement a server-side check to validate that the domain of the email address has valid MX records before allowing signup to complete. This would:

• Automatically reject invalid domains that cannot receive mail.

• Prevent future email delivery failures.

• Improve the quality of the user base.

• Reduce strain on SMTP servers and prevent potential IP blacklisting.

Optional Enhancements (for future consideration):

• Warn users if their domain has no SPF, DKIM, or DMARC records, but don’t block signups based on these.

• Allow admin configuration of email validation rules, including blocking disposable email services or known spam domains.

This small addition would significantly boost email reliability for all eDirectory customers.