>
> I've now added this to existing vars:
>
> # mlmmj 16.02.16 - GH
> MLMMJ_HOME=/var/spool/mlmmj
> domainlist mlmmj_domains = lists.suretec.net
> return_path_remove = false
>

Just for others, return_path_remove = false fixed this when using a
smarthost.

Thanks all.