Re: [exim] Re: Sending mail through a smarthost with TLS

Matthew Ford wrote:

> When I telnet to my remote host on port 465, I just get the following, and
> nothing more...
> Does this confirm that my host is using ssl-on-connect? (NB I know the

It's likely, but it does only confirm that the port is not closed. To
test for SSL, use:

openssl s_client -connect the.host:465

>> Are you positive that the remotehost does not provide TLS on either the
>> SMTP (25) or message-submission (587) port?
> On port 25, yes - but that is blocked by my ISP (I am receiving my
> incoming mail on another non-standard port via a relay service). There is
> no response on port 587.

You could ask the admin of the remote server to listen additionally on
port 587 (usually a simple config change). Also, many servers listen on
non-well-known-ports like 2525 to circumvent ISP blockings.