KMail not sending mail anymore

[Erik Quaeghebeur]

> On Montag, 21. Oktober 2024 09:20:40 Mitteleuropäische Sommerzeit Erik 
> Quaeghebeur wrote:
>> 
>> 09:07:52.067729 akonadi_maildispatcher_agent[8825]:
>> org.kde.pim.maildispatcher: Item  736430 does not have the required
>> attribute Address 

Ingo Klöcker 2024-10-21 10:46 +02:00:
>
> Did you check the outbox? Maybe an invalid message (Item  736430) is stuck 
> there and blocks the sending. Also check the outbox with akonadiconsole if 
> KMail doesn't show anything suspicious in the outbox.

The mail I want to send gets put in the outbox (as usual), but just sits there (not usual). Whether it is invalid or not, I do not know. I do know that the item number in the log message I quoted corresponds to the mail I want to send.

While the mail dispatcher agent does not show any unusual behavior in akonadiconsole, I now often get the message that it is offline and the question of whether I want to set it online. (To which I say yes, but that does not fix the issue.)

My feeling is that some part of my akonadi configuration has become ‘corrupted’, but I have no idea what part or how to find it. In ~/.config/akonadi, nothing seems amiss. In there, I have for
* agent_config_akonadi_maildispatcher_agent:
---
[Agent]
DesiredOnlineState=true
---
* agent_config_akonadi_maildispatcher_agent_changes.dat: just a single TAB character

All ideas of where to look are welcome…

Erik