Hi,
I'm not able to suppress the DOMAIN element of the username part on *this*
machine.
All the machines in the AD have a directive in their /etc/samba/smb.conf
file
winbind use default domain = yes
however this doesn't work on this machine acting as the AD-DC, and looking
at the Samba mailing lists, this is by design, and unlikely to change. It
does work on the workstations (where users are just shown as their
username).
So one "workaround" would be to work out how to suppress the DOMAIN through
Samba / Winbind on this machine. But I have not been able to achieve that
at all, so that's why I'm looking to fix it around postfix.
Nick
On Tue, 26 May 2020 at 13:49, mj wrote:
> Hi,
>
> I have read your mail, and we're using a setup similar to yours (samba,
> postfix, debian) and we're using 'regular' usernames, without the domain
> prefix.
>
> Sometimes, but only in windows, we specify a domain name to make clear
> to windows that we mean the DOMAIN account username, and not a local
> account, or DOMAINB\username.
>
> But in common practise, we never login anywhere with DOMAIN\username
>
> And we also never have the issues you are describing, and no need fotr
> mappings of any kind.
>
> Are you *sure* you need your usernames in that format?
>
> MJ
>
>
> On 26/05/2020 13:50, Nick Piggott wrote:
> > Hello,
> >
> > Here's my setup:
> > * Ubuntu 18.04 LTS
> > * Postfix 3.3.0
> > * Mailutils 3.4
> > * Samba 4.7.6
> > * Active Directory (provided by Samba)
> >
> > My usernames are of the format:
> > * DOMAIN\username
> >
> > I can separately maintain a list of mappings between DOMAIN\username
> > and username.
> >
> > Here are the problems I'm looking to solve appropriately:
> > * mail - sends the origination user as "DOMAIN\username", which
> > postfix provides onto the destination mail exchanger, which rejects it
> > as being an incorrect format
> > * postfix - is configured with:
> > local_recipient_maps = proxy:unix:passwd.byname $alias_maps
> > which flattens the return address to "domain\username", and creates a
> > mailbox in /var/mail as "domain\username". When the user types "mail"
> > to read their email, it opens "DOMAIN\username", so they never see
> > their newly received messages.
> >
> > Things I have tried:
> > * Using
> > sender_canonical_maps = hash:\etc\postfix\sender_canonical
> > to change a specific DOMAIN\username to username. It didn't work,
> > although I could see it parsing sender_canonical.db when sending. The
> > exact line was
> > DOMAIN\\username : username
> > Postfix still provided "DOMAIN\username" as the originator to the
> > destination mail exchanger.
> > * Using
> > recipient_canonical_maps = hash:\etc\postfix\recipient_canonical
> > to convert a specific username back to DOMAIN\username. That failed
> > because the output is still casefolded to domain\username before
> > writing to the mailbox file.
> >
> > Questions:
> > * Am I trying the right approach to rewriting the originating email
> > address from DOMAIN\username to username? What am I potentially
> > missing to get it working?
> > * As postfix will always fold the return address to lowercase (because
> > of the local_recipient_maps filter), should I just softlink together
> > the mailbox files DOMAIN\username and domain\username in /var/mail, or
> > is there a solution I can put into postfix to revert back to
> > DOMAIN\username before outputting to the mail file?
> >
> > Thanks in advance,
> >
>
--
Nick
