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According to Live Direct Marketing's daily DNS scan (July 27, 2026), book4time.com (Tranco rank #152,482) receives mail via Microsoft 365 and sends through SendGrid (Twilio), Zendesk. Its observed DMARC policy is p=quarantine. Across this dataset, 47% of DMARC publishers use an enforcing policy; this does not show where a specific message landed.
Last updated: .
| Mailbox provider (MX) | Microsoft 365 |
|---|---|
| ESPs in SPF | SendGrid (Twilio), Zendesk |
| SaaS senders in SPF | KnowBe4, NetSuite (Oracle) |
| DMARC policy | p=quarantine |
| DMARC record | v=DMARC1; p=quarantine; pct=100; rua=mailto:dmarc-reports@book4time.com; sp=none |
| Tranco rank | #152,482 |
| Snapshot | 2026-07-27 (updated daily) |
MX identifies the observed inbound mailbox or gateway. SPF includes identify services authorised to send for the domain. DMARC shows the published authentication policy. The dataset currently contains 4 populated signal groups for this page.
Observed deliverability context: based on the available observations, this page describes DNS configuration only. It does not represent a complete audit of book4time.com and does not prove that a particular message reaches the inbox or spam folder.
book4time.com uses Microsoft 365 for inbound mail (detected from its primary MX record) as of July 27, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
book4time.com authorises SendGrid (Twilio), Zendesk in its SPF record as of July 27, 2026.
Partially — book4time.com publishes p=quarantine (as of July 27, 2026).
Same daily dataset, three views: how its mailbox provider is trending, how strict DMARC is at its position in the list, and where its own policy sits among all DMARC publishers in the dataset.
The two ways an SPF record silently stops working. Counted from the published record; include chains are resolved one level deep, so the lookup count is a lower bound.
Adoption of the records that go beyond SPF and DMARC. Shown for the whole snapshot — per-domain detail lives on the security posture report.
The MX hostname resolved to its addresses, and those addresses resolved back. Missing or mismatched reverse DNS is one of the few DNS-visible causes of outright rejection.
book4time-com.mail.protection.outlook.com has a PTR pointing to mail-sj2pr05cu00401.inbound.protection.outlook.com, outside its own zone — normal for cloud providers, a warning sign for a self-run server.The same snapshot cut by zone, by list position and by how alive the published policies are.
Nearby domains in the Tranco ranking: crossbeam.com · drogist.nl · benjaminsupply.com · gojiberry.app
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