Sailthru uses Sailthru as their primary email service provider. They rank #19,250 in the Tranco list of most-popular domains. Their email authentication setup is good (score 73/100). Missing: DMARC enforcement.
Non-ESP tools detected in this brand's emails. Independent of who sends — a brand can use any combination.
| HTML builder |
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 3 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to Red Sift OnDMARC. Policy
p=none is monitor-only — receivers won't act on spoofing yet.
DKIM alignment: all 10 observed emails sign with a domain aligned with sailthru.com (mail.sailthru.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 100% TLS 1.3 (across 8 sends).
Delivery (last 7 days): 33% under 10 seconds, 67% over 1 minute (across 3 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: sailthru.com, mail.sailthru.com, nj15mta-58.sailthru.com, morningbrew-b.sailthru.com, pmta237-150.sailthru.com, mta237-112.sailthru.com, morningbrew-d.sailthru.com, condenast-d.sailthru.com, mta237-118.sailthru.com, morningbrew-a.sailthru.com, pmta236-121.sailthru.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 | 10 | 90.9% |
| spam | 1 | 9.1% |
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 % |
|---|---|---|---|---|---|
| Sailthru | 11 | 90.9% | 0.0% | 9.1% |
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 sailthru.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 192.64.237.121 | morningbrew-b.sailthru.com |
2 | — | Check → |
| 192.64.237.71 | morningbrew-a.sailthru.com |
2 | 2 | Check → |
| 192.64.236.58 | nj15mta-58.sailthru.com |
1 | — | Check → |
| 192.64.237.150 | pmta237-150.sailthru.com |
1 | — | Check → |
| 192.64.237.112 | mta237-112.sailthru.com |
1 | — | Check → |
| 192.64.238.35 | morningbrew-d.sailthru.com |
1 | — | Check → |
| 192.64.236.60 | condenast-d.sailthru.com |
1 | — | Check → |
| 192.64.237.118 | mta237-118.sailthru.com |
1 | 1 | Check → |
| 192.64.236.121 | pmta236-121.sailthru.com |
1 | 1 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
mail.sailthru.com | Sailthru 11 |