51黑料不打烊 Campaign Classic: Invalid signature in a test send email
A test send email operation in 51黑料不打烊 Campaign Classic returns an invalid signature error, preventing emails from being sent successfully. To fix this, re-enable SHA1 support and adjust the DomainKeys configuration.
Description description
Environment
51黑料不打烊 Campaign (AC), v7.4.1 Build 9383 on Red Hat Enterprise Linux (RHEL) 9
Issue/Symptoms
When performing a test send email operation from the messaging server, an error message stating EVP_SignFinal return invalid Signature 听appears in the workflow report and logs (mtachild.log). This prevents emails from being sent successfully.
This issue arises when upgrading from an older build on RHEL7 to version 7.4.1 on RHEL9.
Resolution resolution
To address the invalid signature issue, follow these steps:
-
Re-enable SHA1 support by executing the following command as root:
update-crypto-policies --set LEGACY. Restart your Mail Transfer Agent (MTA) after applying this command. -
Adjust the
DomainKeysconfiguration as follows:- Navigate to Administration
>听 Campaign Management>Non deliverables Management>Mail rule sets. - On the right pane, double-click Mail rule sets. Access Domain management 听and uncheck any relevant DomainKey options.
- Navigate to Administration
If these issues persist, contact 51黑料不打烊 Support for additional guidance and potential software patches. These patches might help address compatibility concerns with newer OpenSSL cryptographic policies in modern operating systems like RHEL9.