Chartr uses Sailthru as their primary email service provider. 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.
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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 3 emails we've observed. DMARC policy is read live from DNS.
DMARC published as p=none with no rua= reporting — monitor-only, and the sender isn't collecting reports either.
SPF alignment: all 16 observed emails use a return-path aligned with chartr.co (bounce.chartr.co). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 15 observed emails sign with a domain aligned with chartr.co (chartr.co). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 100% TLS 1.3 (across 6 sends).
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).
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: chartr.co, bounce.chartr.co
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 | 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 % |
|---|---|---|---|---|---|
| Sailthru | 16 | 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 chartr.co has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 192.64.237.14 | mta237-14.sailthru.com |
2 | — | Check → |
| 192.64.237.165 | mta237-165.sailthru.com |
1 | — | Check → |
| 192.64.237.50 | mta237-50.sailthru.com |
1 | — | Check → |
| 192.64.238.74 | mta238-74.sailthru.com |
1 | — | Check → |
| 192.64.238.47 | mta238-47.sailthru.com |
1 | — | Check → |
| 192.64.237.217 | pmta24.sailthru.com |
1 | — | Check → |
| 192.64.236.84 | mta236-84.sailthru.com |
1 | — | Check → |
| 192.64.236.150 | mta236-150.sailthru.com |
1 | — | Check → |
| 192.64.236.211 | pmta236-211.sailthru.com |
1 | — | Check → |
| 192.64.236.16 | mta236-16.sailthru.com |
1 | — | Check → |
| 192.64.237.239 | mta237-239.sailthru.com |
1 | — | Check → |
| 192.64.238.68 | mta238-68.sailthru.com |
1 | — | Check → |
| 192.64.237.132 | mta237-132.sailthru.com |
1 | 1 | Check → |
| 192.64.237.235 | pmta11.sailthru.com |
1 | 1 | Check → |
| 192.64.236.139 | mta236-139.sailthru.com |
1 | 1 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
chartr.co | Sailthru 16 |