I have resolved this now.
When configuring an account using Outlook 365 the dialog allows you to
specify:
IMAP server:
mail.eclipse.co.uk Port: 143 SSL: No
SMTP server:
smtp.eclipse.co.uk Port: 25 SSL: No
... and the last step is where Outlook 365 tests the configuration
before saving it. Here it fails, simply saying the test of the
connection to the SMTP server failed.
I found an old laptop running Outlook XP (from about 2002), configured
it with the same parameters, and the connection worked correctly. So
the parameters as specified by Eclipse are correct.
If I review (using the "repair" option, but cancelling without saving
any changes) a different email account on Outlook 365 that does work shows:
IMAP server:
mail.eclipse.co.uk Port: 993 SSL: Yes
*** However *** if I close Outlook 365 and use Control Panel | Mail to
edit or create an email account, I can specify the parameters required
by Eclipse and the final step which tests the settings does work.
Further, the existing different account actually showed "Port: 143 SSL:
No", contrary to the values previously seen within Outlook 365.
I then run Outlook 365 and it sends and receives email as expected.
So my conclusion is that Outlook 365 now (since an upgrade about 6 weeks
ago) expects you to use SSL, and the inbuilt account management tool
says "Microsoft Outlook 365 knows best" and changes the parameters I
provide.
The other issue with the SMTP server provided by Eclipse is that they
have no mechanism to accept an authenticated connection; they rely on
the fact that you are sending from one of their IP addresses. So when
away from home you would have to reconfigure your email client to use a
third party SMTP server and provide whatever authentication is required
by that server. This is clearly stupid, but Eclipse are evidently
discontinuing support for domestic customers (without actually telling
them). Presumably business customers could buy the use of an Exchange
Server or other more sophisticated mail service from Eclipse, and an
authenticated SMTP connection (also requiring SSL) would be available.
--
Graham J