On Fri, Feb 17, 2017 at 05:24:54PM -0500, Viktor Dukhovni wrote: > > > On Feb 17, 2017, at 10:43 AM, Chris Green <c...@isbd.net> wrote: > > > > Ah, I've maybe just spotted the reason, smtp_tls_wrappermode is new in > > postfix 3, is that what makes the difference? > > Yes. > > > I'd still like a simple explanation though! :-) > > That's the simple explanation. SMTP directly over TLS requires the new > feature. TLS via the SMTP STARTTLS command dates back to Postfix 2.2 > (and unofficial patches in even older Postfix versions). > OK, so the older version is using SMTP STARTTLS which runs on port 587 and the newer (>=3) version is using TLS directly on port 465.
Should it still be possible to use SMTP STARTTLS on port 587 with newer postfix versions? I couldn't make this work, or at least I don't think I could. I'd be happier using as far as possible the same configuration on all my installations. -- Chris Green
