Client getting bounce on sending email to me her mail id is ( arunkumar.alagirisamy@agshealth.com) please help me solve this issue not only this another mail also getting bounce

Suganthi@takesolutions.com

jagan@navitas.net

visa@travego.in

jayanthi.natarajan@archeangroup.com

vishnupriya.k@prodapt.com

i need quick solutions becuase not getting mail from customer make so problem, please do needfull