Troubleshoot and resolve Duplicate entry '0' for key 'PRIMARY' errors.
Troubleshoot and resolve issues with email importing retrieving the same email replies multiple times.
Troubleshoot and resolve issues with DirectAdmin sending piped email replies twice.
Troubleshoot and resolve duplicate system themes appearing in the System Theme menu.
Troubleshoot and resolve issues with valid email being flagged as spam.
Troubleshoot and resolve The system blocked a potential email loop. (WHMCS 8.4 and later) or Blocked Potential Email Loop (WHMCS 8.3 and earlier) errors.
Troubleshoot and resolve TypeError: array_search(): Argument #2 ($haystack) must be of type array errors.