Domains with DNS TXT v=spf1 mx a:mail.vision.it a:relay1.sinapto.net a:relay3.sinapto.net -all

There are 2 domains that have DNS TXT set to v=spf1 mx a:mail.vision.it a:relay1.sinapto.net a:relay3.sinapto.net -all. The top 2 records ordered by domain rank are listed below.

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