[Akonadi] [Bug 399811] New: imap (dovecot) is no longer accessible

[Ivan S. J.]

https://bugs.kde.org/show_bug.cgi?id=399811

            Bug ID: 399811
           Summary: imap (dovecot) is no longer accessible
           Product: Akonadi
           Version: 5.7.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: grave
          Priority: NOR
         Component: IMAP resource
          Assignee: kdepim-bugs at kde.org
          Reporter: isj-bugzilla at i1.dk
  Target Milestone: ---

SUMMARY
kmail 5.7.3 cannot access IMAP folders anymore. kmail 4.11.15 and 4.14 can.
Symptom is no new emails arrive and system log fills up with:

---snip---
Oct 14 21:36:09 isjsys4.i1.dk akonadi_imap_resource[4026]:
org.kde.pim.imapresource: Session login cancelled
Oct 14 21:36:09 isjsys4.i1.dk akonadi_imap_resource[4026]: org.kde.pim.kimap:
Connection to server lost  4
Oct 14 21:36:09 isjsys4.i1.dk akonadi_imap_resource[4026]:
org.kde.pim.imapresource: Session login cancelled
Oct 14 21:36:10 isjsys4.i1.dk akonadi_imap_resource[4026]: org.kde.pim.kimap:
Connection to server lost  4
Oct 14 21:36:10 isjsys4.i1.dk akonadi_imap_resource[4026]:
org.kde.pim.imapresource: Session login cancelled
Oct 14 21:36:10 isjsys4.i1.dk akonadi_imap_resource[4026]: org.kde.pim.kimap:
Connection to server lost  4
---snip---

IMAP server is dovecot 2.1.7

I have tried to remove .config/akonadi* and .local/share/akonadi* and *kmail*
and reconfiguring; Changing from imaps (port 993) to plain imap (port 143);
Restarting akonadi with akonadictl. Same result.

STEPS TO REPRODUCE
1. Use dovecot 2.1.7
2. Configure IMAP account as usual
3. (no profit)

OBSERVED RESULT
IMAP folder doesn't appear. Status in settings->configure accounts flashes
rapidly between ready/offline.

EXPECTED RESULT
That the IMAP folder would work.

SOFTWARE VERSIONS
(available in About System)
KDE Plasma Version: ?
KDE Frameworks Version: 5.45.0
Qt Version: 5.9.4

ADDITIONAL INFORMATION

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