Multiple MX records same name with different priority

Question

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

Answer

It only works for backup or fail-over situations. Since my requirement was for SES receiving emails. So I end up creating a subdomain and using that for SES to receive emails.

Multiple MX records same name with different priority

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