behaviorOnMxFailure property
The action that you want to take if the required MX record can't be found
when you send an email. When you set this value to
UseDefaultValue, the mail is sent using amazonses.com as
the MAIL FROM domain. When you set this value to RejectMessage,
the Amazon SES API v2 returns a MailFromDomainNotVerified
error, and doesn't attempt to deliver the email.
These behaviors are taken when the custom MAIL FROM domain configuration is
in the Pending, Failed, and
TemporaryFailure states.
Implementation
final BehaviorOnMxFailure behaviorOnMxFailure;