Why Your Email Signature May Not Be Valid

When our system checks the digital signature on your email, it may fail validation for the following reasons:

Common Validation Failures

1. Email Not Digitally Signed

• The email was sent without a digital signature
• The sender did not use email signing software
• The email security features were not enabled when sending

2. Invalid or Corrupted Signature

• The digital signature is damaged or incomplete
• The signature data became corrupted during transmission
• The email was modified after it was signed
• The cryptographic verification failed

3. Certificate Problems

• The digital certificate used to sign the email is corrupted
• The certificate data cannot be read by our system
• The certificate information is incomplete or malformed

4. Wrong Email Format

• The email format is not compatible with our security standards
• The email structure does not meet digital signature requirements
• The email type is not recognized as a signed message

5. Technical Processing Errors

• Our system encountered an error while checking the signature
• The email structure could not be properly analyzed
• Unexpected issues occurred during the security verification process

Recommended Actions

• If you find and email that you believe it should be valid, please reach support with the email to further evaluation.