Multiple MX records same name with different priority

I am using route 53 for my hosted DNS. We are using office 365 mail server and trying to configure SES to receive the emails by following (https://docs.aws.amazon.com/ses/latest/DeveloperGuide/receiving-email-consider-use-case.html). I update the MX record and TXT records as follows:

abc.com MX Simple - 0 abc-com.mail.protection.outlook.com.
10 inbound-smtp.us-east-1.amazonaws.com.

abc.com TXT Simple - "v= include:spf.protection.outlook.com -all"
"amazonses:aAsrlp/F3Inn0ErZw"
_amazonses.abc.com TXT Simple - "aAsrlp/F3Inn0ErZw5gu"

1. How the Route 53 send the emails to the second MX end point with the valid of 10 inbound-smtp.us-east-1.amazonaws.com?
2. SES is not writing the email to the S3 bucket