Domains with DNS TXT v=spf1 a mx include:_spf.yourfilter.nl include:_spf.mailer.twinfield.com -all

There are 17 domains that have DNS TXT set to v=spf1 a mx include:_spf.yourfilter.nl include:_spf.mailer.twinfield.com -all. The top 17 records ordered by domain rank are listed below.

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