Mail Protection - Requirements

Requirements for Sending Emails to SentraGuard-Protected Domains

To successfully send an email to a domain protected by SentraGuard, it is essential to meet the following requirements:

DKIM Check:

The DKIM (DomainKeys Identified Mail) configuration must be present and valid. SentraGuard verifies the existence and correctness of the DKIM record to ensure email authenticity.

DMARC Check:

The DMARC (Domain-based Message Authentication, Reporting, and Conformance) configuration must exist and be correctly set up. SentraGuard enforces strict compliance with DMARC to prevent spoofing.

SPF Check:

The SPF (Sender Policy Framework) record must be present and properly configured. SentraGuard uses SPF to confirm the legitimacy of the sending server.

Error Messages for Misconfigurations or Missing Entries

If any required configurations are missing or incorrect, the following error messages may occur:

Rejected Email Address or Domain
"Your message from YOUR_EMAIL_ADDRESS has been rejected. Your email address or domain has been blocked by our spam policy."
Explanation: Your email or domain appears on the blocklist. Contact your administrator for further clarification.
Blocked IP Address
"Your IP address has been blocked due to security policies."
Explanation: The IP address used for sending the email is on the blocklist. Reach out to your administrator to resolve the issue.
SPF, DMARC, or DKIM Errors
"Your mail has been rejected by SentraGuard: Your SPF, DMARC, or DKIM entry is invalid, incorrect, or missing. Please contact your administrator."
Explanation: Ensure that all required records (SPF, DMARC, DKIM) are correctly configured.

For assistance or to resolve these issues, please contact your system administrator. If you are the administrator you can also contact us to check why you have problems sending emails.
Please provide the following details:
- The email address you are sending from
- The email address you are sending to
- The time you sent the email