Klaviyo uses Klaviyo for marketing email and Salesforce CRM for transactional/notifications. They rank #616 in the Tranco list of most-popular domains. We've also observed sends via 4 other providers: HubSpot, SendGrid, Amazon SES, EcoSend. Email goes out from 3 different subdomains. Their email authentication setup is solid (score 100/100). We've recorded 25 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 klaviyo.com. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: 91% of observed emails use an aligned return-path (send.klaviyo.com, 48163345m.klaviyo.com, em6480.klaviyo.com); the rest use third-party paths (emailmarketingnyc.com, salesforce.com, inboxally.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 502 observed emails sign with a domain aligned with klaviyo.com (klaviyo.com, 48163345m.klaviyo.com, 48163345t.klaviyo.com). DKIM authenticates the visible From — supports DMARC directly.
VMC issued by: digicert.
TLS: 67% TLS 1.3, 33% TLS 1.2 (across 210 sends).
Delivery: fast — 92% of emails in the last 7 days arrive in under 10 seconds (across 66 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
HubSpot 180 Zendesk 73 SendGrid 9 Amazon SES 3 EcoSend 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: klaviyo.com, send.klaviyo.com, us-west-2.amazonses.com, 48163345m.klaviyo.com, em6480.klaviyo.com, 836ttl2xltld.d-efhieae.usa232.bnc.salesforce.com, 48163345t.klaviyo.com, unhkfy49e3pxo1.d-efhieae.usa232.bnc.salesforce.com, emailmarketingnyc.com, salesforce.com, rygflasbhqoa.d-efhieae.usa232.bnc.salesforce.com, inboxally.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 | 479 | 95.6% |
| promotions | 22 | 4.4% |
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 | 135 | 91.1% | 8.9% | 0.0% | |
| Klaviyo | 250 | 97.2% | 2.8% | 0.0% | |
| Amazon SES | 2 | 100.0% | 0.0% | 0.0% | |
| EcoSend | 1 | 0.0% | 100.0% | 0.0% | |
| Salesforce CRM | 15 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 9 | 88.9% | 11.1% | 0.0% | |
| Zendesk | 67 | 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 klaviyo.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 192.161.152.31 | mta-out1.pod27.use2.zdsys.com |
14 | — | Check → |
| 192.161.152.33 | mta-out3.pod27.use2.zdsys.com |
12 | 3 | Check → |
| 192.161.152.40 | mta-out10.pod27.use2.zdsys.com |
9 | — | Check → |
| 192.161.152.34 | mta-out4.pod27.use2.zdsys.com |
6 | — | Check → |
| 168.245.23.173 | o1.mail.accredible.com |
5 | — | Check → |
| 192.161.152.45 | mta-out15.pod27.use2.zdsys.com |
5 | — | Check → |
| 167.89.63.49 | o2.mail.credential.net |
5 | — | Check → |
| 192.161.152.41 | mta-out11.pod27.use2.zdsys.com |
5 | 1 | Check → |
| 192.161.152.38 | mta-out8.pod27.use2.zdsys.com |
4 | 2 | Check → |
| 192.161.152.43 | mta-out13.pod27.use2.zdsys.com |
3 | — | Check → |
| 192.161.152.32 | mta-out2.pod27.use2.zdsys.com |
3 | — | Check → |
| 192.161.152.44 | mta-out14.pod27.use2.zdsys.com |
3 | — | Check → |
| 192.161.152.35 | mta-out5.pod27.use2.zdsys.com |
2 | — | Check → |
| 54.240.85.169 | a85-169.smtp-out.us-west-2.amazonses.com |
2 | — | Check → |
| 192.161.152.42 | mta-out12.pod27.use2.zdsys.com |
2 | — | Check → |
| 192.161.152.36 | mta-out6.pod27.use2.zdsys.com |
2 | — | Check → |
| 192.161.152.39 | mta-out9.pod27.use2.zdsys.com |
1 | — | Check → |
| 192.161.152.37 | mta-out7.pod27.use2.zdsys.com |
1 | — | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
klaviyo.com | Klaviyo 329 Zendesk 73 HubSpot 16 Salesforce CRM 15 SendGrid 9 Amazon SES 3 EcoSend 1 | |
hello.klaviyo.com | HubSpot 161 Klaviyo 8 | |
content.klaviyo.com | HubSpot 3 |
