Since upgrade to Kmail 5.4.3 I'm unable to Delete mails when multiple mails are selected. Mind that I don't mean "Move to Trash". I'm talking about "Delete" (skip trash) which has default shortcut shift-del attached to it. When I select one mail I can shift-delete it. When I select two or more mails, this fails.
I've tested a little further and now notice that the mail list looses focus when (multi)selecting mails (it seems focus moves to the mail window, but I'm not sure). If I'm able to craftily refocus the maillist (while keeping the multiselection) I can shift-del the mails.
Still present in latest KDE Neon (v5.5.2). Single delete on messages in my IMAP inbox works. Shift-select many and press delete, none of them are removed.
see #380182 Fixed in 5.5.3
Could you please reopen this bug as I'm using 5.5.3 and this bug is still persist on that version.
I doubt this is a duplicate of 380182. That bug speaks of inconsistent removals between kmail and server. This bug is about a focus problem on the mail list preventing deletion in the first place.
I think #373969 might be the duplicate of this.
This is fixed for me after update to Ubuntu 17.10 Artful, Plasma 5.11, Kmail 5.5.3.