PTR

usb-smtp-delivery-3.mimecast.com

usb-smtp-outbound-1.mimecast.com

usb-smtp-outbound-2.mimecast.com

A record for

`usb-smtp-delivery-3.mimecast.com`
	A	170.10.150.243
	A	170.10.152.243
`usb-smtp-outbound-1.mimecast.com`
	A	170.10.152.243
`usb-smtp-outbound-2.mimecast.com`
	A	170.10.152.243

33%	170.10.150.243

South Salt Lake, Utah, 🇺🇸 USA

^{🇺🇸 Mimecast-NA170.10.152.0/24 Mimecast NA}