Hi,
Since I upgraded kubuntu to latest release (I now have kmail 5.1.3), the address autocomplete does not work anymore, at all (from address book or recent addresses).
In kmail settings i have "use baloo search for autocompletion", and "use recent addresses for autocompletion").
The only bug report I found is for kmail 5.0.2 and it talks of address book and not recent addresses.

Also, the search function does not seem to work, but the quick search works. I don't know if it is related.
Thanks.

see https://bugs.kde.org/show_bug.cgi?id=354400

Ok, the behaviour I have now is described at the end of this bug report : I have to write a few letters, then erase the address I started to write, and type some letters again. After the second try I have the autocompletion working correctly.
But if I open a new mail, I have to do this again, type, erase and type again.

yea there's a bug, if you click the select button it does work as expected but it adds steps