Installed kde 4.14 over existing 4.13.3 on debian 3.14
Since then no more messages were fetched from an imap server.
From another provider (GMX) messages were fetched.
I tried un- and encrypted access, deleted the account in sytemsettings, redefined the account after system restart. Now all messages in all folders / subfolders were not shown/fetched.
Installed icedove - Got all messages. Installed old version kmail - all good.

Reproducible: Always

Actual Results:  
No new messages fetched

Expected Results:  
fetch all messages

Stdout from akonadiconsole:
akonadi_imap_resource_14(19378) BatchFetcher::onUidSearchDone: Search job failed:  "Suche fehlgeschlagen, die Serverantwort lautet: A004812 NO Error in IMAP command received by server. " 
akonadi_imap_resource_14(19378) RetrieveItemsTask::onRetrievalDone: "" 
akonadi_imap_resource_14(19378) BatchFetcher::onUidSearchDone: Search job failed:  "Suche fehlgeschlagen, die Serverantwort lautet: A004816 NO Error in IMAP command received by server. " 
akonadi_imap_resource_14(19378) RetrieveItemsTask::onRetrievalDone: "" 
akonadi_imap_resource_14(19378) BatchFetcher::onUidSearchDone: Search job failed:  "Suche fehlgeschlagen, die Serverantwort lautet: A004874 NO Error in IMAP command received by server. " 
akonadi_imap_resource_14(19378) RetrieveItemsTask::onRetrievalDone: "" 
akonadi_imap_resource_14(19378) BatchFetcher::onUidSearchDone: Search job failed:  "Suche fehlgeschlagen, die Serverantwort lautet: A004878 NO Error in IMAP command received by server. " 
akonadi_imap_resource_14(19378) RetrieveItemsTask::onRetrievalDone: "" 
akonadi_imap_resource_14(19378) BatchFetcher::onUidSearchDone: Search job failed:  "Suche fehlgeschlagen, die Serverantwort lautet: A004882 NO Error in IMAP command received by server. " 
akonadi_imap_resource_14(19378) RetrieveItemsTask::onRetrievalDone: ""