include:mailgun.org takes three DNS-lookups for your customers
Your SPF-setup include:mailgun.org takes three DNS-lookups for your customers.
I don't think this is professional enough. Ten DNS-look-ups is their maximum.
See:
https://www.mailhardener.com/tools/spf-validator?domain=mailgun.org
7
votes

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Roy Polinder commented
I see this even got more. up to 5 lookups right now.