Stubhub uses SendGrid as their primary email service provider. They rank #6,894 in the Tranco list of most-popular domains. Email goes out from 2 different subdomains. Their email authentication setup is good (score 80/100).
Non-ESP tools detected in this brand's emails. Independent of who sends — a brand can use any combination.
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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 4 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to stubhub.com. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: all 5 observed emails use a return-path aligned with stubhub.com (vmail.stubhub.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 17 observed emails sign with a domain aligned with stubhub.com (stubhub.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 100% TLS 1.3 (across 8 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: stubhub.com, vmail.stubhub.com, mail.stubhub.com, ptr670.stubhub.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 | 16 | 66.7% |
| promotions | 6 | 25.0% |
| spam | 2 | 8.3% |
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 | 23 | 65.2% | 26.1% | 8.7% |
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 stubhub.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 149.72.188.214 | o15.ptr670.stubhub.com |
5 | — | Check → |
| 149.72.186.46 | o12.ptr9238.em.mail.stubhub.com |
5 | 1 | Check → |
| 149.72.209.80 | wrqvdkrh.outbound-mail.sendgrid.net |
4 | 1 | Check → |
| 149.72.209.95 | wrqvdkrf.outbound-mail.sendgrid.net |
4 | 1 | Check → |
| 149.72.209.88 | wrqvdkrv.outbound-mail.sendgrid.net |
3 | — | Check → |
| 149.72.192.43 | o13.ptr4391.mail.stubhub.com |
2 | — | Check → |
| 149.72.209.39 | o14.ptr2828.mail.stubhub.com |
1 | — | Check → |