You will get the credentials like below,
SMTP Username : AKIAI2UF2E6HR
SMTP Password : ApzSV6JYWBIVciHfQb34nIHJtbRCWqf
Use this credentials in sasl_passwd file.
Step 4 : At the command prompt, run the following command to create a hashmap database file containing your SMTP credentials.
- postmap hash:/etc/postfix/sasl_passwd
Step 5 : Now change the Owner and permission of files for security reasons because these files are not in encrypted format so we should protect them as much as possible.