Dolphin send to will only use KMail

[Teunis]

In the System Settings I have set Thunderbird as the mail client.
But right clicking a file in Dolphin and selecting Sent as E-mail attachment results in KMail opening up.

[vinnywright]

I think every thing in system settings has been ported to KF5 ,,,,,,but dolphin is still a plasma4 app ,,,,,so it is probably looking in the wrong place to see what the default "mail" program is .

VINNY

[Teunis]

Yes you are probably right, too many of these type of niggles to be a coincidence.

Patience is a nice virtue...