https://www.gmass.co/features/send-as-replies
Mar 22, 2022 - Send mass emails as replies in prior threads with contacts to better simulate real one-on-one emailing for better results.
sendrepliesmakemassemails
https://www.sap.com/uk/products/hcm/partners/effective-people-as-ep-mass-hire.html
Simplify Employee Data Migration with EP Mass Hire
a seffectivepeopleepmass