The sender domain has a DMARC Reject/Quarantine policy which disallows
sending mailing list messages using the original "From" header.
To mitigate this problem, the original message has been wrapped
automatically by the mailing list software.
As automatic helper assignment is disabled in recent Linux kernels,
explicit rules must be added to the raw table for each helper.
While commit f50a524 in the firewall3 project added a set of default
rules and other additional related functionality, both this and the
alternative manual methods of defining these rules require kmod-ipt-raw.
Signed-off-by: Steven Honson <steven@honson.id.au>
a73283dc10