Mastermind uses HubSpot as their primary email service provider. They rank #251,893 in the Tranco list of most-popular domains. 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 6 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to mastermind.com. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: observed emails use a third-party return-path (bf06.eu1.hubspotemail.net) — SPF passes there but doesn't align with mastermind.com, so DMARC has to rely on DKIM alignment.
DKIM alignment: all 18 observed emails sign with a domain aligned with mastermind.com (mastermind.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: 0% TLS 1.3, 100% TLS 1.2 (across 14 sends).
Dynamic content: NiftyImages — real-time/personalised email content layered on top of the ESP.
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.
No additional ESPs authorized in the brand's SPF beyond the confirmed senders above.
Probed: mastermind.com, bf06.eu1.hubspotemail.net
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 | 20 | 100.0% |
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 % |
|---|---|---|---|---|---|
| HubSpot | 19 | 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 mastermind.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Reputation |
|---|---|---|---|
| 143.244.84.92 | bd77e8u.bf06.eu1.hubspotemail.net |
5 | Check → |
| 143.244.84.93 | bd77e8v.bf06.eu1.hubspotemail.net |
4 | Check → |
| 143.244.81.31 | bd77elt.bf06.eu1.hubspotemail.net |
4 | Check → |
| 143.244.83.46 | bd77e0g.bf06.eu1.hubspotemail.net |
3 | Check → |
| 143.244.84.94 | bd77e8w.bf06.eu1.hubspotemail.net |
2 | Check → |
| 143.244.83.42 | bd77e0c.bf06.eu1.hubspotemail.net |
1 | Check → |
| 143.244.84.87 | bd77e8p.bf06.eu1.hubspotemail.net |
1 | Check → |
Per-IP inbox / promotions / spam is being collected and will appear here as new emails are observed.
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
mastermind.com | HubSpot 20 |