Otter uses Braze for marketing email and SendGrid for transactional/notifications. They rank #10,289 in the Tranco list of most-popular domains. Email goes out from 3 different subdomains. Their email authentication setup is good (score 80/100).
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.
SPF / DKIM / DMARC above reflect the last 10 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to otter.ai. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: all 87 observed emails use a return-path aligned with otter.ai (em9754.otter.ai). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 78 observed emails sign with a domain aligned with otter.ai (otter.ai, marketing.otter.ai). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 95% TLS 1.3 (across 37 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 15 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: otter.ai, em9754.otter.ai, updates.otter.ai, marketing.otter.ai, ptr8462.otter.ai, ptr8897.otter.ai, ptr8355.otter.ai, ptr4284.otter.ai
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 | 82 | 96.5% |
| promotions | 3 | 3.5% |
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 % |
|---|---|---|---|---|---|
| Braze | 3 | 33.3% | 66.7% | 0.0% | |
| SendGrid | 76 | 98.7% | 1.3% | 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 otter.ai has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 149.72.129.217 | o1.ptr4284.otter.ai |
31 | 5 | Check → |
| 149.72.215.51 | o2.ptr8462.otter.ai |
28 | 6 | Check → |
| 159.183.143.222 | o4.ptr8897.otter.ai |
18 | 1 | Check → |
| 149.72.218.104 | o3.ptr8355.otter.ai |
17 | 5 | Check → |
| 223.165.123.122 | bz1122.marketing.otter.ai |
2 | — | Check → |
| 223.165.122.140 | bz1123.updates.otter.ai |
1 | — | Check → |
| 223.165.122.123 | unknown |
1 | — | Check → |
