Gmail Email Markup not Working

Question

I\'m testing Gmail\'s Email Markup functionality for Parcel Deliveries, and it seems I can\'t get it right. This is the e-mail content after sending an e-mail to myself:

Answer 1

If you use Google SMTP relay, you have to use an SPF record looking like this :

600 IN TXT "v=spf1 a include:_spf.google.com ~all"

Source: https://support.google.com/a/answer/178723?hl=en