Uspto uses Amazon SES as their primary email service provider. They rank #3,014 in the Tranco list of most-popular domains. Email goes out from 2 different subdomains. Their email authentication setup is solid (score 85/100).
Amazon SESAuthentication 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 valigov.email. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: 4% of observed emails use an aligned return-path (amazonses.uspto.gov); the rest use third-party paths (snd-j5q27edl42ryy.us-east-1.messagingfabric.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 25 observed emails sign with a domain aligned with uspto.gov (subscriptions.uspto.gov, uspto.gov). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 100% TLS 1.3 (across 12 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: uspto.gov, amazonses.uspto.gov, snd-j5q27edl42ryy.us-east-1.messagingfabric.com, subscriptions.uspto.gov
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 | 5 | 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 % |
|---|---|---|---|---|---|
| Amazon SES | 5 | 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 uspto.gov has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Reputation |
|---|---|---|---|
| 66.179.17.230 | mailer017230.govd3.service.govdelivery.com |
12 | Check → |
| 66.179.19.59 | mailer019059.govd2.service.govdelivery.com |
12 | Check → |
| 54.240.9.54 | a9-54.smtp-out.amazonses.com |
1 | Check → |
Per-IP inbox / promotions / spam is being collected and will appear here as new emails are observed.
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
subscriptions.uspto.gov | Amazon SES 24 | |
uspto.gov | Amazon SES 1 |
