MX Records: Correctly configured Mail Exchange records are essential for receiving emails.

SMTP Server Status: Your mail servers must be reachable and respond correctly.

TLS Encryption: Secure Sockets Layer (TLS) encrypts email communication, protecting it from eavesdropping.

SPF (Sender Policy Framework): An SPF record prevents spammers from sending messages with forged "From" addresses at your domain.

DMARC (Domain-based Message Authentication, Reporting & Conformance): DMARC uses SPF and DKIM to determine the authenticity of an email message and provides instructions on how to handle suspicious emails.

DKIM (DomainKeys Identified Mail): DKIM adds a digital signature to outgoing messages, allowing receiving servers to verify that the message was sent from an authorized server.

Reverse DNS (PTR Records): Properly configured Reverse DNS helps verify that an IP address legitimately belongs to a sending domain, reducing the chances of emails being marked as spam.

Blacklist Status: Checks if your mail server IPs are listed on common DNS-based blacklists (DNSBLs), which can severely impact deliverability.

Deliverability: Ensures your emails reach the intended recipients' inboxes and are not flagged as spam.

Security: Protects your domain from being used for phishing, spoofing, and other malicious activities.

Reputation: A well-configured email system builds trust with recipients and other mail servers.

Compliance: Some industries require specific email security standards.

Brand Protection: Prevents unauthorized use of your domain for sending emails, safeguarding your brand image.