mimecast.com子域名:
usb-smtp-outbound-1.mimecast.com
us-smtp-outbound-1.mimecast.com
eu-smtp-delivery-137.mimecast.com
de-smtp-delivery-223.mimecast.com
au-smtp-outbound-1.mimecast.com
de-smtp-inbound-2.mimecast.com
us-smtp-delivery-214.mimecast.com
us-smtp-delivery-162.mimecast.com
eu-smtp-delivery-141.mimecast.com
au-smtp-inbound-2.mimecast.com
eu-smtp-outbound-2.mimecast.com
eu-smtp-outbound-1.mimecast.com
eu-smtp-o365-outbound-1.mimecast.com
eu-smtp-inbound-4.mimecast.com
eu-smtp-inbound-1.mimecast.com
au-smtp-inbound-1.mimecast.com
de-smtp-inbound-1.mimecast.com
eu-smtp-inbound-2.mimecast.com