Surferseo uses HubSpot for marketing email and SendGrid for transactional/notifications. They rank #26,585 in the Tranco list of most-popular domains. We've also observed sends via Mailgun. Email goes out from 2 different subdomains. Their email authentication setup is solid (score 95/100).
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.
DMARC reports sent to surferseo.com. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: 23% of observed emails use an aligned return-path (em2535.surferseo.com); the rest use third-party paths (bf04.eu1.hubspotemail.net) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 13 observed emails sign with a domain aligned with surferseo.com (surferseo.com, mail.surferseo.com). DKIM authenticates the visible From — supports DMARC directly.
VMC issued by: digicert.
TLS: modern — 80% TLS 1.3 (across 5 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Mailgun 1ESPs 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: surferseo.com, bf04.eu1.hubspotemail.net, em2535.surferseo.com, mail.surferseo.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 | 13 | 92.9% |
| spam | 1 | 7.1% |
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 | 10 | 90.0% | 0.0% | 10.0% | |
| Mailgun | 1 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 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 surferseo.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Reputation |
|---|---|---|---|
| 143.244.81.68 | bd77emu.bf04.eu1.hubspotemail.net |
8 | Check → |
| 143.244.82.36 | bd77es2.bf04.eu1.hubspotemail.net |
2 | Check → |
| 198.244.55.127 | a127.a94b46b0.use4.send.mailgun.net |
1 | Check → |
Per-IP inbox / promotions / spam is being collected and will appear here as new emails are observed.