@pmangahis Thank you so much for your prompt reply. Sorry to posted unrelated topic here. In config.Inc.php our email setting details below, Even we have added one of our gmail in smtp username and smtp password. But not observed any changes. Please could you help us, how we solve this issue?
; Email Settings ;
;;;;;;;;;;;;;;;;;;
[email]
; Use SMTP for sending mail instead of mail()
; smtp = On
; SMTP server settings
; smtp_server = mail.example.com
; smtp_port = 25
; Enable SMTP authentication
; Supported mechanisms: ssl, tls
; smtp_auth = ssl
; smtp_username = username
; smtp_password = password
; Allow envelope sender to be specified
; (may not be possible with some server configurations)
; allow_envelope_sender = Off
; Default envelope sender to use if none is specified elsewhere
; default_envelope_sender = my_address@my_host.com