SX_INTERNET_ADDRESS_TO_NORMAL SAP function module to check email format is correct

The below code shows how SAP function module SX_INTERNET_ADDRESS_TO_NORMAL is used check the format of an email address entered by a user.

*& Report  CHECK_EMAIL
*& Created On: Oct 2009
*& Created By: SAP Development
TYPES: BEGIN OF sx_address,                     "SAPconnect general addr
  type        TYPE sxaddrtype-addr_type,
  address     TYPE soextreci1-receiver,
   END OF sx_address.
DATA: unstruct TYPE sx_address.
PARAMETERS: p_email type string.
unstruct-type = 'INT'.
unstruct-address = p_email.
    ADDRESS_UNSTRUCT                     = unstruct
*     COMPLETE_ADDRESS                     = 'X'
*     ADDRESS_NORMAL                       =
*     LOCAL                                =
*     DOMAIN                               =
*     COMMENT                              =
*     ADDR_NORMAL_NO_UPPER                 =
   ERROR_ADDRESS_TYPE                   = 1
   ERROR_ADDRESS                        = 2
   ERROR_GROUP_ADDRESS                  = 3
   OTHERS                               = 4.
if sy-subrc ne 0.
  message i000(zz) with 'Please enter valid email address'.
  message i000(zz) with 'Email address is valid'.

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