Listkit uses HubSpot for marketing email and SendGrid for transactional/notifications. Their email authentication setup is good (score 73/100). Missing: DMARC enforcement.
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 6 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: 15% of observed emails use an aligned return-path (em8471.listkit.io, outbound.intercom.listkit.io); the rest use third-party paths (bf04x.hubspotemail.net) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 24 observed emails sign with a domain aligned with listkit.io (listkit.io). DKIM authenticates the visible From — supports DMARC directly.
TLS: 29% TLS 1.3, 71% TLS 1.2 (across 7 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 4 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Intercom 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: listkit.io, bf04x.hubspotemail.net, outbound.intercom.listkit.io, em8471.listkit.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 | 22 | 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 % |
|---|---|---|---|---|---|
| HubSpot | 18 | 100.0% | 0.0% | 0.0% | |
| Intercom | 1 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 3 | 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 listkit.io has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 108.179.148.139 | 4f2ol5.bf04x.hubspotemail.net |
3 | — | Check → |
| 139.180.17.69 | bc1qr37.bf04x.hubspotemail.net |
3 | 1 | Check → |
| 159.183.73.49 | wfbtqwpk.outbound-mail.sendgrid.net |
3 | 2 | Check → |
| 139.180.17.68 | bc1qr36.bf04x.hubspotemail.net |
2 | — | Check → |
| 108.179.148.128 | 4f2olu.bf04x.hubspotemail.net |
2 | 1 | Check → |
| 139.180.17.79 | bc1qr4h.bf04x.hubspotemail.net |
2 | — | Check → |
| 108.179.148.131 | 4f2olx.bf04x.hubspotemail.net |
2 | — | Check → |
| 139.180.17.66 | bc1qr34.bf04x.hubspotemail.net |
1 | — | Check → |
| 192.174.84.113 | mta-174-84-113.intercom.com.sparkpostmail.com |
1 | — | Check → |
| 143.244.90.158 | bd77ghc.bf04x.hubspotemail.net |
1 | — | Check → |
| 143.244.90.221 | bd77gi3.bf04x.hubspotemail.net |
1 | — | Check → |
| 108.179.148.143 | 4f2ol9.bf04x.hubspotemail.net |
1 | — | Check → |
| 143.244.91.1 | bd77gj3.bf04x.hubspotemail.net |
1 | — | Check → |
| 54.174.52.137 | pgg147.bf04x.hubspotemail.net |
1 | — | Check → |
| 54.174.52.217 | pgg17f.bf04x.hubspotemail.net |
1 | — | Check → |
| 143.244.90.132 | bd77ggm.bf04x.hubspotemail.net |
1 | — | Check → |
| 108.179.148.142 | 4f2ol8.bf04x.hubspotemail.net |
1 | — | Check → |