IMAP with STARTTLS on port 143 is broken

[Mark - Syminet]

Just upgraded from eoan -> fossa to test. Incoming mail is configured
to use STARTTLS over port 143 and works fine in eoan and bionic.

But in fossa, upon startup IMAP immediately fails with error message:

'The reported error was "Error performing TLS handshake: An unexpected
TLS packet was received."'

...no incoming mail and none of the folders will open.

Workaround: Switch account configuration to use TLS directly over
dedicated port 993

Then everything works as normal. But users for whom port 993 is not an
option, no incoming mail or access to their mailfolders.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: evolution 3.34.1-2build1
ProcVersionSignature: Ubuntu 5.4.0-9.12-generic 5.4.3
Uname: Linux 5.4.0-9-generic x86_64
ApportVersion: 2.20.11-0ubuntu15
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Jan 24 15:34:28 2020
InstallationDate: Installed on 2018-10-06 (475 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: Upgraded to focal on 2020-01-24 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sebastien Bacher (seb128)]

Thank you for your bug report, could you try if you still get the issue with the update from bug #1876286 ?

[Mark - Syminet (mark-syminet)]

Dug further on this and the issue is an ancient TLS version being used on the server, so this bug can be closed. BTW is there any way for me to close the bug myself since I filed it? Thnx -

[Kai Kasurinen (kai-kasurinen)]

This bug report is being closed due to your last comment regarding this being fixed. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.

[Mark - Syminet (mark-syminet)]

Gotit - thanks!

On Fri, 2020-07-17 at 15:36 +0000, Kai Kasurinen wrote:
> This bug report is being closed due to your last comment regarding this
> being fixed. For future reference you can manage the status of your own
> bugs by clicking on the current status in the yellow line and then
> choosing a new status in the revealed drop down box. You can learn more
> about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you
> again for taking the time to report this bug and helping to make Ubuntu
> better. Please submit any future bugs you may find.
>
> ** Changed in: evolution (Ubuntu)
> Status: Incomplete => Invalid
>