Fathom uses HubSpot for marketing email and Postmark for transactional/notifications. They rank #21,926 in the Tranco list of most-popular domains. Their email authentication setup is solid (score 85/100). We've recorded 2 ESP changes since first observing this brand.
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 10 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to DMARC Digests. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: 93% of observed emails use an aligned return-path (pm-bounces.fathom.video); the rest use third-party paths (bf08x.hubspotemail.net, transactional.hubspotemail.net) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 76 observed emails sign with a domain aligned with fathom.video (fathom.video). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 96% TLS 1.3 (across 53 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 13 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: fathom.video, bf08x.hubspotemail.net, pm-bounces.fathom.video, transactional.hubspotemail.net
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 | 75 | 98.7% |
| promotions | 1 | 1.3% |
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 | 7 | 85.7% | 14.3% | 0.0% | |
| Postmark | 66 | 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 fathom.video has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 50.31.156.116 | sc-ord-mta116.mtasv.net |
24 | 3 | Check → |
| 50.31.156.121 | sc-ord-mta121.mtasv.net |
12 | 6 | Check → |
| 50.31.156.117 | sc-ord-mta117.mtasv.net |
9 | 4 | Check → |
| 50.31.156.120 | sc-ord-mta120.mtasv.net |
9 | 4 | Check → |
| 50.31.156.124 | sc-ord-mta124.mtasv.net |
7 | — | Check → |
| 50.31.156.113 | sc-ord-mta113.mtasv.net |
6 | — | Check → |
| 50.31.156.115 | sc-ord-mta115.mtasv.net |
4 | 1 | Check → |
| 50.31.156.126 | sc-ord-mta126.mtasv.net |
4 | — | Check → |
| 50.31.156.114 | sc-ord-mta114.mtasv.net |
4 | 1 | Check → |
| 143.244.88.228 | bd77f42.bf08x.hubspotemail.net |
2 | — | Check → |
| 50.31.156.118 | sc-ord-mta118.mtasv.net |
2 | — | Check → |
| 143.244.88.155 | bd77f21.bf08x.hubspotemail.net |
1 | — | Check → |
| 108.179.150.174 | 4f2o1c.bf08x.hubspotemail.net |
1 | — | Check → |
| 108.179.150.110 | 4f2ozk.transactional.hubspotemail.net |
1 | — | Check → |
| 108.179.150.211 | 4f2o2d.transactional.hubspotemail.net |
1 | — | Check → |
| 108.179.150.104 | 4f2oze.transactional.hubspotemail.net |
1 | 1 | Check → |