Hi Veera,
please check queue module which can satisfy your requirement
https://marketplace.mendix.com/link/component/106628
Look at using the built-in Task Queue if you are using Mendix 9.
https://docs.mendix.com/refguide/task-queue/
Place your emailing logic into a separate microflow and call this using “Execute this microflow in a Task Queue” in the “Call microflow” activity.
https://docs.mendix.com/refguide/task-queue/#queuing
Mendix offers a premium email module that handles sending email if you don’t have your own SMTP server.
https://marketplace.mendix.com/link/component/118393
Hope this helps.