> On Oct 19, 2016, at 1:22 PM, Viktor Dukhovni <[email protected]> wrote:
> 
> 
>> On Oct 19, 2016, at 9:00 AM, Felipe Gasper <[email protected]> wrote:
>> 
>> 
>> Exim’s approach is BEAUTIFUL for the purpose of separate certificates per 
>> domain. cPanel 11.60 just shipped with this support added. The great thing 
>> is that, unlike Apache or Dovecot, the mapping of domain to certificate is 
>> dynamic, not in a static list. For shared hosting environments, where each 
>> machine/VPS can serve tens of thousands of individual domains, this is a 
>> boon.
>> 
>> I’d be fine with some facility to configure by-domain configs, logs, or what 
>> not in tandem with the certificate. Just as long as it’s still simple and 
>> easy to determine the certificate by the DOMAIN, not by served content.
> 
> What's even more beautiful is using a single MX hostname for a boatload
> of domains, with a single associated certificate.  Works great for
> domeneshop.no (serving over 100k DANE-enabled SMTP domains via 4 MX
> hosts), and transip.nl (serving a similar number of domains), ...
> 
> I am somewhat sympathetic to the desire for SNI on port 587, where
> asking users to change settings is a bear, with port 25 SMTP, I've
> yet to see a compelling reason for server-side SNI support.  Do not
> go there, unless your back's against the wall...

I’m probably missing something here … how do you get STARTTLS clients to 
accept/request the correct hostname for TLS when there is only one TLS-secured 
FQDN?

-FG
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