> From: Steve Williams
>
> I'm trying to set up Exim to allow authenticated users to send mail
> from any local domains, without Exim adding the sender and return-path
> headers.
>
> Exim will authenticate users using AUTH PLAIN. However whenever an
> authenticated user sends an e-mail the Sender header is set to be
> <username>@<primary-domain>. The return-path is also set to the same.
> I do not want Exim to change these headers. It is made worse when the
> username is 'user@???', because the header values become
> user@???@primarydomain.com - this then breaks SPF checking.
>
> I only want authenticated users to be able to send e-mails, but I do
> not want their usernames added to the headers at all. I also only want
> authenticated users to send e-mail from the local domains on the
> server. How can I achieve this?
>
> I have already tried (possibly incorrectly) setting:
>
> accept authenticated = *
> control = submission/sender_retain
I use:
accept authenticated = *
control = submission/domain=
(with nothing after "domain=").
If some of your users use Windows then you need also
https://github.com/Exim/exim/wiki/BlockCracking
