Yes, this domain seems to be configured correctly to accept inbound mail.
But keep in mind, this doesn't identify spamtraps nor did we test individual addresses.
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spam folder placement, DMARC, DKIM or SPF authentication? Check out
Spam Resource or
contact me.
Hosting:
Inbound mail for gunbroker.com is hosted by arsmtp.com
arsmtp.com hosts mail for at least 11,055 domains, including: