Look up your DMARC record, check your policy, and find issues that hurt deliverability.
DMARC is a TXT record at _dmarc.yourdomain that tells inbox providers what to do with mail that fails SPF and DKIM alignment. It also tells them where to send aggregate reports so you can see who is sending as your domain.
p=none only monitors, p=quarantine sends failing mail to spam, and p=reject blocks it. Start at none, watch reports, then tighten. A missing rua address means you get no visibility, so always include one.
Google and Yahoo now require DMARC for bulk senders. Without it, your mail is more likely to land in spam and your domain is easier to spoof.
DeliverSignal runs these checks daily and alerts you when something breaks.
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