Insidehook uses Klaviyo for marketing email and SparkPost for transactional/notifications. They rank #32,347 in the Tranco list of most-popular domains. We've also observed sends via Constant Contact. Email goes out from 2 different subdomains. Their email authentication setup is solid (score 100/100). We've recorded 2 ESP changes since first observing this brand.
Authentication signals observed in this brand's emails. SPF, DKIM and DMARC are the standard sender-authentication stack — see the DMARC policy below for whether spoofing is actually blocked or just monitored. One-click unsubscribe meets Google & Yahoo's bulk-sender requirements.
SPF / DKIM / DMARC above reflect the last 6 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to insidehook.com. Policy
p=reject means receivers actively block or quarantine spoofed mail.
DKIM alignment: all 62 observed emails sign with a domain aligned with insidehook.com (email.insidehook.com, insidehook.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: 9% TLS 1.3, 91% TLS 1.2 (across 11 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 4 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Constant Contact 2ESPs we've seen sending email for this brand. Green = confirmed by SPF, sender IP rDNS, or known infra pairing (label shows the source). Grey = observed but not yet confirmed by SPF or PTR.
ESPs this brand has authorized in their SPF record. We confirm them with a green ✓ only after seeing recurring use (3+ emails across 2+ days). Until then they stay here — either we haven't observed any email yet, or we've seen a handful but not enough to call them a regular sender for the brand.
Probed: insidehook.com, email.insidehook.com
Folder distribution across all emails from this brand observed in Gmail inboxes. High inbox % = good deliverability; spam appearances are the headline signal.
| Folder | Count | Share |
|---|---|---|
| inbox | 56 | 87.5% |
| promotions | 8 | 12.5% |
Which ESP's emails are landing where. Sorted by spam % so problem senders surface first. Brands using one ESP for marketing and another for transactional often see very different placement profiles per ESP. Per-ESP folder data only started being captured recently — counts here may be smaller than the total above until backfill catches up.
| ESP | Emails | Placement | Inbox % | Tabs % | Spam % |
|---|---|---|---|---|---|
| SparkPost | 51 | 90.2% | 9.8% | 0.0% | |
| Constant Contact | 2 | 100.0% | 0.0% | 0.0% | |
| Klaviyo | 3 | 100.0% | 0.0% | 0.0% |
Daily observations per ESP. Brands often run multiple ESPs concurrently — marketing on one, transactional on another — so this chart shows usage rather than switches.
IP addresses insidehook.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 137.22.236.146 | h63umvww.email.insidehook.com |
83 | 4 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
email.insidehook.com | SparkPost 64 | |
insidehook.com | SparkPost 10 Klaviyo 5 Constant Contact 2 |