Am 20.11.2013 13:55, schrieb bitozoid: > On Tue, Nov 19, 2013 at 1:32 PM, Brian Evans <grkni...@scent-team.com> wrote: >> The smtp client process does not have support for the deprecated smtps >> protocol (465) you are trying to use. > > I have another instance of postfix working against other smarthost > (Exchange in this case) via port 465, and it seems not to be a problem > at all
you do not - not with a public relay - period > Afaik it is better to work with standard port numbers, > but it is not a requirement if the other side is your server and you configured 465 wrong with STARTTLS yes but 587/465 is not only the port, 465 is TLS wrapper mode which means the initial connection has to be done encrpyted and so it works technically completly different than STARTTLS _______________________________________ http://www.postfix.org/TLS_README.html Client-side SMTPS support Although the Postfix SMTP client by itself doesn't support TLS wrapper mode, it is relatively easy to forward a connection through the stunnel program if Postfix needs to deliver mail to some legacy system that doesn't support STARTTLS. Use one of the following two examples, to send only some remote mail, or to send all remote mail, to an SMTPS server.
