code: public void setMailFromDomainAttributes(java.util.Map<String, IdentityMailFromDomainAttributes> mailFromDomainAttributes) {
          this.mailFromDomainAttributes = mailFromDomainAttributes == null ? null
                  : new com.amazonaws.internal.SdkInternalMap<String, IdentityMailFromDomainAttributes>(mailFromDomainAttributes);
      }
docs: <p>
  A map of identities to custom MAIL FROM attributes.
  </p>
  
  @param mailFromDomainAttributes
  A map of identities to custom MAIL FROM attributes.