IMPORTANT: how to ensure perfect deliverability
If you're using our Marketing add-on to send mass emailing campaigns, you should also add our partner's IP addresses to your SPF.
@ 3600 IN TXT "v=spf1 a ip4:220.127.116.11 ip4:18.104.22.168/30 ~all"
and of course, it's SPF2 version:
@ 3600 IN TXT "v=spf2.0/pra ip4:22.214.171.124 ip4:126.96.36.199/30 ~all"
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