On 2018-12-17 Phil Pennock via Exim-dev <[email protected]> wrote: > On 2018-12-16 at 10:42 +0000, Jeremy Harris via Exim-dev wrote: > > On 16/12/2018 10:20, Andreas Metzler via Exim-dev wrote: > > > 4.92rc1 adds this to the smarthost_smtp transport: > > > > > > tls_sni = $host > > > > > > I do not think that always works as expected. Depending on the DNS setup > > > (CNAME, round robin) $host will not contain the name of the selected > > > smarthost anymore but a different value. [...] > I think that I just missed that we might adapt `$host` during the life > of the Transport.
> <https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_smtp_transport.html> > 30.2 > Absent `hosts_override` or `hosts` directly on the Transport, Round > Robin A records have no cause to change the host _name_. So the only > issue should be CNAME records? [...] Hello Phil, I only recognized the problem because we have had to workaound/document around it in Debian for ages. - We have been using ${lookup{$host} in smtp authentication. CNAME for smarthost is very common, the biggest players (office365, gmail and yahoo) use it. cu Andreas -- `What a good friend you are to him, Dr. Maturin. His other friends are so grateful to you.' `I sew his ears on from time to time, sure' -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
