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Email infrastructure of isc.org

According to Live Direct Marketing's daily DNS scan (July 13, 2026), isc.org (Tranco rank #3,347) receives mail via Self-Hosted and sends through Mailchimp, Salesforce. Its DMARC policy is p=none (monitor only) — like the majority of DMARC publishers (53% don't enforce).

Mailbox provider (MX)Self-Hosted
ESPs in SPFMailchimp, Salesforce
SaaS senders in SPFShopify
DMARC policyp=none
DMARC recordv=DMARC1; p=none; sp=reject; rua=mailto:0rzssdyk@ag.dmarcian.com; ruf=mailto:0rzssdyk@fr.dmarcian.com, mailto:dmarcforensic@isc.org; fo=1;
Tranco rank#3,347
Snapshot2026-07-13 (updated daily)

Frequently asked questions

What email provider does isc.org use?

isc.org uses Self-Hosted 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 isc.org use?

isc.org authorises Mailchimp, Salesforce in its SPF record as of July 13, 2026.

Does isc.org enforce DMARC?

No — isc.org 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 isc.org at Gmail, Outlook, Yandex and Mail.ru.
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