Hello, all.
My email office server is SME9 with TLS on POP3 and SMTP.
While inside the subnet, KMail works fine as also TB and Evolution.
While outside (from home, for example), KMail returns "Server Error" on sending mails (which? what? why?), but both TB and Evolution work fine!
How is it possible to debug the problem?
Many thanks ahead.
Leon

Somehow I have now a bit more information.
After the last update the notification icon also shows the following:
Failed to transport message. Server error Failed to transport message.
Server error. Failed to store result in item. [LLCONFLICT] Resource akonadi_maildir_resource_1 tries to modify item with revision 0; the item was modified elsewhere and has revision 1, aborting STORE. Failed to transport message. Server error.
Can somebody help me with this?
Thanks a lot.