[root@server mailserver]# cd /path/to/mailserver
[root@server mailserver]# docker run --rm -v "$(pwd)/config":/tmp/docker-mailserver -ti tvial/docker-mailserver:latest generate-dkim-config 2048
mkdir: invalid option -- 'e'
Try 'mkdir --help' for more information.
Creating DKIM private key /tmp/docker-mailserver/opendkim/keys/domain.tld -e MAIL_PASS=mypassword -ti tvial/docker-mailserver:latest /bin/sh -c 'echo "/mail.private
Unknown option: e
Unknown option: i
Unknown option: c
Unknown option: e
Unknown option: i
Unknown option: c
opendkim-genkey: usage: opendkim-genkey [options]
        --append-domain        include domain name in zone file stub
        --bits=n               use n bits to generate the key
        --directory=path       leave output in the named directory
        --domain=name          generate data for the named domain [domain.tld]
        --hash-algorithms=list limit to use of the named algorithm(s)
        --help                 print help and exit
        --note=string          include specified note in zone data
        --restrict             restrict key to email use only
        --selector=name        selector name [mail]
        --subdomains           allow signing of subdomains
        --testmode             indicate key is in test mode
        --verbose              increased output
        --version              print version and exit
Creating DKIM KeyTable
/usr/local/bin/generate-dkim-config: 52: /usr/local/bin/generate-dkim-config: cannot create /tmp/docker-mailserver/opendkim/KeyTable: Directory nonexistent
Creating DKIM SigningTable
/usr/local/bin/generate-dkim-config: 63: /usr/local/bin/generate-dkim-config: cannot create /tmp/docker-mailserver/opendkim/SigningTable: Directory nonexistent
Creating DKIM private key /tmp/docker-mailserver/opendkim/keys/FIRST_DOMAIN.tld/mail.private
Creating DKIM KeyTable
Creating DKIM SigningTable
Creating DKIM private key /tmp/docker-mailserver/opendkim/keys/SECOND_DOMAIN.tld/mail.private
Creating DKIM private key /tmp/docker-mailserver/opendkim/keys/THIRD_DOMAIN.tld/mail.private
Creating DKIM TrustedHosts