mail.oculardata.com is running exim, and it is listening on port 25 (whence STARTTLS is available, which exim supports as a client). It is also listening on port 465, requiring tls-on-connect (which exim doesn't support as a client). It is *not* listening on the standard MSA port (587). Short of running a portscan, I can't tell if it is listening on any non-standard ports.

Do you have any influence on the configuration of your smarthost (mail.oculardata.com)? If so, the most straightforward solution to your apparent "port 25 blocked" problem is to configure it to listen on port 587 (and require authentication), or some non-standard port (using the same rules as port 25).

If not, perhaps you can get your ISP to lift the port 25 block for you, at least to this one host.

Failing both of those, stunnel it is...

- Fred


Yeah, I have pretty significant influence on the configuration when I know exactly what i want and what to ask for, but not so much if I limp in without much information.

I'll look into what you've suggested, it sounds more promising than the other avenues so far

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