Dears,
Is it possible to send emails from kexi as with ms access???

Hi,
Not now, but it would be good to file such a wish: https://community.kde.org/Calligra/File_a_bug_or_wish

It is also interesting what service you want to use to send email, e.g. invoke your default web client or send silently without any interaction. In all cases such sending needs to be configured by you, as a programmer of the KEXI db app, and users need to use specific email client that you support.

On most high level future KEXI could be able to invoke external script so all you will need to do is to supply such a script which sends email. Allowing this of course affects security of the system so it needs to be well planned.