On Wed, Sep 27, 2017 at 07:00:39PM -0700, Michael Fox wrote:
> > This is an obsolete option in Sendmail that violates decades old SMTP
> > standards, CNAME canonicalization of recipient domains went away in
> > RFC 2821 and there are many email domains that are aliases where the
> > mailbox
> > On Sep 26, 2017, at 11:23 PM, Michael Fox wrote:
> >
> > BTW, the mail provider found that the default sendmail config and their
> own
> > customized config both rewrote the From: header when the From: address
> was
> > for a domain that had a CNAME record. They said this is
> On Sep 26, 2017, at 11:23 PM, Michael Fox wrote:
>
> BTW, the mail provider found that the default sendmail config and their own
> customized config both rewrote the From: header when the From: address was
> for a domain that had a CNAME record. They said this is a config
> > Michael Fox skrev den 2017-09-21 19:52:
> > > I have a problem that seems to have started when I upgraded from
> Ubuntu
> > > 14.04/Postfix 2.11.0 to Ubuntu 16.04/Postfix 3.1.0. It involves the
> > > From:
> > > and Return Path: addresses seen by recipients of mail sent from a
> > > virtual
>