[Bug 189382] New: No usage of imap+TLS when server doesn't use a greeting with imap capabilities

[mark at tvk.rwth-aachen.de]

https://bugs.kde.org/show_bug.cgi?id=189382

           Summary: No usage of imap+TLS when server doesn't use a
                    greeting with imap capabilities
           Product: kmail
           Version: 1.11.1
          Platform: Gentoo Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: mark at tvk.rwth-aachen.de


Version:           1.11.1 (using KDE 4.2.1)
Compiler:          gcc 4.3.3 
OS:                Linux
Installed from:    Gentoo Packages

Our mailserver (dovecot) has the ability to send the imap capabilities in it's
greeting message or to disable this behaviour:
-----------
# Send IMAP capabilities in greeting message. This makes it unnecessary for
# clients to request it with CAPABILITY command, so it saves one round-trip.
# Many clients however don't understand it and ask the CAPABILITY anyway.
login_greeting_capability = yes
-----------

With this option enabled, a telnet login prints the following output and kmail
works without errors:
-----------
* OK [CAPABILITY IMAP4rev1 SASL-IR SORT THREAD=REFERENCES MULTIAPPEND UNSELECT
LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS UIDPLUS LIST-EXTENDED
I18NLEVEL=1 STARTTLS AUTH=PLAIN] Dovecot ready.
-----------

But after setting this parameter to "no" (greeting then is "Dovecot ready"),
kmail is not able to fetch emails with TLS enabled, though the detection of TLS
works in the account settings. kmail seems to do nothing at all until the
connection is closed by the server.
I had to set kmail to SSL instad and then it worked with the current server
configuration.

So my guess is: kmail logs in and uses TLS properly for this connection if and
only if the server _greets_ with STARTTLS, though the correct capabilities can
be read with the capabilities-command.

Please let kmail either use the capabilities-command directly directly after
connection (if no capabilities are received by the greeting message), which is
probably the best way or let kmail use the settings from the account settings.

Oh, and a warning/notification in some way would be great, e.g. "Logging in...
OK", "no capabilities in greeting, asking capabilities..." as label messages in
the status bar.

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