Sanity uses Marketo for marketing email and Postmark for transactional/notifications. They rank #4,500 in the Tranco list of most-popular domains. We've also observed sends via Amazon SES. Their email authentication setup is solid (score 90/100).
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 Postmark DMARC. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: 50% of observed emails use an aligned return-path (pm-bounces.sanity.io, envelope.sanity.io); the rest use third-party paths (potomac1050.mktomail.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 5 observed emails sign with a domain aligned with sanity.io (sanity.io). DKIM authenticates the visible From — supports DMARC directly.
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Amazon SES 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: sanity.io, envelope.sanity.io, potomac1050.mktomail.com, pm-bounces.sanity.io
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 | 6 | 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 | 1 | 100.0% | 0.0% | 0.0% | |
| Marketo | 3 | 100.0% | 0.0% | 0.0% | |
| Postmark | 2 | 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 sanity.io has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Reputation |
|---|---|---|---|
| 192.28.150.226 | potomac1226.mktomail.com |
2 | Check → |
| 50.31.205.207 | mta207-ab1.mtasv.net |
2 | Check → |
| 24.110.89.109 | i89-109.smtp-out.amazonses.com |
1 | Check → |
| 192.28.150.227 | potomac1227.mktomail.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) |
|---|---|---|
sanity.io | Marketo 3 Postmark 2 Amazon SES 1 |
