Amazon SES giving choice to use subdomain for outgoing email.
Created subdomain with name mail
Amazon SES require to setup DNS.
MX - mail.xyz.com - 10 feedback-smtp.ap-southeast-1.amazonses.com
TXT - mail.xyz.com - “v=spf1 include:amazonses.com ~all”
Failed to create the MX but succeeded for TXT.
However succeeded if create MX record with 10feedback-smtp.ap-southeast-1.amazonses.com
the different : 10 feedback vs 10feedback.
no space between 10 and feedback.