Adding local mail server to online accounts not possible

[Wolf Rogner]

In Settings / Online Accounts
trying to connect a local SMTP/IMAP account fails.

Trying to add the IMAP works (one has to ignore the warning about self signed certificate).
SMTP does not get added

(gnome-control-center-alt:6192): GoaBackend-WARNING **: g_socket_client_connect_to_host() failed: Could not connect to smtp.rsb.intern: Connection refused (g-io-error-quark, 39)

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-control-center 1:3.25.92.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.12.0-13.14-generic 4.12.10
Uname: Linux 4.12.0-13-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 8 12:57:37 2017
InstallationDate: Installed on 2017-09-05 (2 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170902)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.