Masterworks uses Amazon SES as their primary email service provider. They're the #205,708 most-visited website overall, per Tranco (a web-popularity measure, not an email one). We've also observed sends via SparkPost. Their email authentication setup is solid (score 100/100).
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.
SPF / DKIM / DMARC above reflect the last 2 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to everest.email. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: 86% of observed emails use an aligned return-path (reply.masterworks.com); the rest use third-party paths (sparkpostmail1.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 7 observed emails sign with a domain aligned with masterworks.com (masterworks.com). DKIM authenticates the visible From — supports DMARC directly.
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).
SparkPost 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: masterworks.com, reply.masterworks.com, sparkpostmail1.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 | 7 | 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 | 6 | 100.0% | 0.0% | 0.0% | |
| SparkPost | 1 | 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 masterworks.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 54.240.9.8 | a9-8.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.9.23 | a9-23.smtp-out.amazonses.com |
1 | — | Check → |
| 54.240.9.4 | a9-4.smtp-out.amazonses.com |
1 | — | Check → |
| 54.240.9.26 | a9-26.smtp-out.amazonses.com |
1 | — | Check → |
| 54.240.9.2 | a9-2.smtp-out.amazonses.com |
1 | 1 | Check → |
| 192.174.87.113 | mta-174-87-113.smtp-out.sparkpostmail.com |
1 | 1 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
masterworks.com | Amazon SES 6 SparkPost 1 |
