This blog will help you getting all the e-mail addresses maintained against a Contact Person.
Please follow the below steps-
1.) Tcode to change Contact Person- BUA2
Enter the BP here and press enter.
2.) To add email address go to email address field and click on other email addresses as shown below-
3.) Add the new email addresses-
4.) Use FM- BUPA_ADDRESS_READ_DETAIL to get all the email addresses maintained against a contact person-
IV_PARTNER = Business Partner
IV_ADSMTP = X
Hope this help.