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Email infrastructure of libsyn.com

According to Live Direct Marketing's daily DNS scan (July 13, 2026), libsyn.com (Tranco rank #2,688) receives mail via Google Workspace and sends through HubSpot, Postmark, Zendesk. Its DMARC policy is p=none (monitor only) — like the majority of DMARC publishers (53% don't enforce).

Mailbox provider (MX)Google Workspace
ESPs in SPFHubSpot, Postmark, Zendesk
SaaS senders in SPFPayPal Braintree
DMARC policyp=none
DMARC recordv=DMARC1; p=none; rua=mailto:xsvyulnz@ag.us.dmarcian.com,mailto:re+9cb4050ed7ce@inbound.dmarcdigests.com
Tranco rank#2,688
Snapshot2026-07-13 (updated daily)

Frequently asked questions

What email provider does libsyn.com use?

libsyn.com uses Google Workspace for inbound mail (detected from its primary MX record) as of July 13, 2026, per Live Direct Marketing's daily Tranco top-1M scan.

What ESP does libsyn.com use?

libsyn.com authorises HubSpot, Postmark, Zendesk in its SPF record as of July 13, 2026.

Does libsyn.com enforce DMARC?

No — libsyn.com publishes p=none, which only monitors and does not block spoofing (as of July 13, 2026).

DNS records say who should deliver your mail — they don't say whether it lands in the inbox. Run a free inbox placement test for libsyn.com at Gmail, Outlook, Yandex and Mail.ru.
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