> On May 26, 2018, at 8:30 AM, Sean Son <linuxmailinglistsem...@gmail.com>
> wrote:
>
> Also, if I set smtpd_tls_ciphers" and/or "smtp_tls_ciphers" to "high" , won't
> that conflict with opportunistic TLS.
Only for senders that don't support any of the modern ciphersuites.
> You had mentioned that adding those settings would force RC4 only
> implementations t o send in the clear.. Won't that be a problem with
> opportunistic TLS?
Yes, but very rarely in practice. Perhaps not at all for your site.
Only you can tell. You'll need to check your logs.
--
Viktor.
