This is a log trace when item delivery works as expected [akonadiserver] processing retrieval request for item 46 parts: ("RFC822") of resource: "akonadi_mixedmaildir_resource_29" akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceBase::requestItemDelivery: uid= 46 remoteId= "0" parts= ("RFC822") scheduler.isEmpty= true akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleItemFetch: akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleItemFetch: idx= -1 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleNext: mCurrentTask.type= 0 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleNext: singleShot akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::executeNext: mCurrentTask.type= 0 isEmpty= false akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::executeNext: mCurrentTask.type= 4 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceBasePrivate::slotPrepareItemRetrieval: akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceBasePrivate::slotPrepareItemRetrievalResult: job->error= 0 akonadi_mixedmaildir_resource_29(16758)/akonadiresource (maildir) MixedMaildirResource::retrieveItem: job= 0x911a098 item= 46 collection= "2000" akonadi_mixedmaildir_resource_29(16758)/akonadiresource (maildir) MixedMaildirResource::retrieveItemResult: job= 0x911a098 error= 0 akonadi_mixedmaildir_resource_29(16758)/akonadiresource (maildir) MixedMaildirResource::retrieveItemResult: calling itemRetrieved with item 46 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleNext: mCurrentTask.type= 0 [akonadiserver] continuing [akonadiserver] checking if request for item 46 has been processed... [akonadiserver] request for item 46 processed, error: "" This is a log trace when it doesn't [akonadiserver] processing retrieval request for item 46 parts: ("RFC822") of resource: "akonadi_mixedmaildir_resource_29" akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceBase::requestItemDelivery: uid= 46 remoteId= "0" parts= ("RFC822") scheduler.isEmpty= true akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleItemFetch: akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleItemFetch: idx= -1 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleNext: mCurrentTask.type= 3 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleNext: mCurrentTask.type= 0 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleNext: singleShot akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleNext: mCurrentTask.type= 0 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::scheduleNext: singleShot akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::executeNext: mCurrentTask.type= 0 isEmpty= false akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::executeNext: mCurrentTask.type= 4 akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceBasePrivate::slotPrepareItemRetrieval: akonadi_mixedmaildir_resource_29(16758)/libakonadi Akonadi::ResourceScheduler::executeNext: mCurrentTask.type= 4 isEmpty= true [akonadiserver] continuing [akonadiserver] checking if request for item 46 has been processed... [akonadiserver] request for item 46 processed, error: "Unable to retrieve item from resource: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken." [akonadiserver] ItemRetrieverException : Unable to retrieve item from resource: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken. The step that does not appear as expected is Akonadi::ResourceBasePrivate::slotPrepareItemRetrievalResult In Akonadiconsole's debuggger this looks like this: 150 UID FETCH 46 CACHEONLY ANCESTORS INF EXTERNALPAYLOAD (UID REMOTEID REMOTEREVISION COLLECTIONID FLAGS SIZE DATETIME) * 46 FETCH (UID 46 REV 1 REMOTEID "0" MIMETYPE "message/rfc822" COLLECTIONID 504 SIZE 3865 DATETIME "16-Jul-2010 11:36:00 +0000" REMOTEREVISION "" FLAGS () ANCESTORS ((504 "2000") (462 "2000") (449 "GMX") (432 "Archiv") (431 "/dvl/Mail") (0 ""))) then there is a long pause (> 30 seconds) and then 150 OK UID FETCH completed immediately followed by the next command.