The outbound DKIM is not working in IMSVA.
Disable header checks that hide private information in order for DKIM Signing to work. Note that both must not enabled at the same time.
To resolve this issue:
- Log in to IMSVA as root.
- Modify header_check file.
- Comment out the header_checks, simlar to the following:
- Press ESC:wq! then ENTER to save.
- Restart postfix,
- Test by semding a mail to Gmail. The check if the mail header from the recipient IMSVA adds the DKIM-Signature for all outgoing email.