Higgsfield uses Customer.io for marketing email and SendGrid for transactional/notifications. They rank #7,594 in the Tranco list of most-popular domains. Email goes out from 4 different subdomains. Their email authentication setup is solid (score 85/100).
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 7 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to dmarcian. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: all 7 observed emails use a return-path aligned with higgsfield.ai (cio128117.team.higgsfield.ai, cio128117.m.higgsfield.ai, clkmail.higgsfield.ai). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 7 observed emails sign with a domain aligned with higgsfield.ai (cio128117.team.higgsfield.ai, cio128117.m.higgsfield.ai, higgsfield.ai). DKIM authenticates the visible From — supports DMARC directly.
TLS: 14% TLS 1.3, 86% TLS 1.2 (across 7 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 2 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
None — only the primary ESP(s) shown aboveESPs 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: higgsfield.ai, clkmail.higgsfield.ai, cio128117.m.higgsfield.ai, cio128117.team.higgsfield.ai, cio128117.t.higgsfield.ai, m.higgsfield.ai, team.higgsfield.ai, t.higgsfield.ai
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 | 6 | 75.0% |
| promotions | 2 | 25.0% |
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 % |
|---|---|---|---|---|---|
| SendGrid | 1 | 100.0% | 0.0% | 0.0% | |
| Customer.io | 6 | 66.7% | 33.3% | 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 higgsfield.ai has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 159.183.147.115 | o5.ptr1737.clerk.dev |
2 | — | Check → |
| 143.55.227.74 | v574.v54f91261.use4.send.mailgun.net |
2 | 2 | Check → |
| 159.112.253.59 | v559.v59719d68.use4.send.mailgun.net |
1 | 1 | Check → |
| 159.112.241.114 | v5114.v5c4dda55.use4.send.mailgun.net |
1 | 1 | Check → |
| 161.38.193.10 | v510.v56f0a4e3.use4.send.mailgun.net |
1 | 1 | Check → |
| 143.55.227.71 | v571.v54f91261.use4.send.mailgun.net |
1 | 1 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
team.higgsfield.ai | Customer.io 3 | |
higgsfield.ai | SendGrid 2 | |
m.higgsfield.ai | Customer.io 2 | |
t.higgsfield.ai | Customer.io 1 |