Flowium uses Klaviyo for marketing email and SendGrid for transactional/notifications. We've also observed sends via 11 other providers: Mailgun, Customer.io, Amazon SES, SparkPost, HubSpot, Beehiiv, Substack, Salesforce MC, Shopify Messaging, Epsilon, Brevo. Their email authentication setup is good (score 73/100). Missing: DMARC enforcement. We've recorded 29 ESP changes since first observing this brand.
Non-ESP tools detected in this brand's emails. Independent of who sends — a brand can use any combination.
| HTML builder |
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 published as p=none with no rua= reporting — monitor-only, and the sender isn't collecting reports either.
SPF alignment: 86% of observed emails use an aligned return-path (email.flowium.com); the rest use third-party paths (emailmarketingnyc.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 331 observed emails sign with a domain aligned with flowium.com (flowium.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: 58% TLS 1.3, 43% TLS 1.2 (across 200 sends).
Delivery: fast — 90% of emails in the last 7 days arrive in under 10 seconds (across 72 sends).
Dynamic content: NiftyImages — real-time/personalised email content layered on top of the ESP.
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Mailgun 33 Customer.io 28 Amazon SES 28 SparkPost 28 HubSpot 13 Beehiiv 9 Substack 8 Salesforce MC 7 Shopify Messaging 3 Epsilon 1 Brevo 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.
Shopify Messaging
✓ via SendGrid
Amazon SES
observed
"Observed" pills mean we detected emails from these ESPs, but they don't appear in any SPF record we probed. They may still be properly authorized — sending infrastructure can live on subdomains we haven't seen yet, or use IP-listing instead of include: directives.
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: flowium.com, email.flowium.com, emailmarketingnyc.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 | 293 | 99.7% |
| promotions | 1 | 0.3% |
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 % |
|---|---|---|---|---|---|
| Amazon SES | 24 | 100.0% | 0.0% | 0.0% | |
| Beehiiv | 9 | 100.0% | 0.0% | 0.0% | |
| Brevo | 1 | 100.0% | 0.0% | 0.0% | |
| Customer.io | 24 | 100.0% | 0.0% | 0.0% | |
| Epsilon | 1 | 100.0% | 0.0% | 0.0% | |
| HubSpot | 11 | 100.0% | 0.0% | 0.0% | |
| Klaviyo | 39 | 97.4% | 2.6% | 0.0% | |
| Mailgun | 20 | 100.0% | 0.0% | 0.0% | |
| Salesforce MC | 5 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 36 | 100.0% | 0.0% | 0.0% | |
| Shopify Messaging | 3 | 100.0% | 0.0% | 0.0% | |
| SparkPost | 13 | 100.0% | 0.0% | 0.0% | |
| Substack | 6 | 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 flowium.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 167.89.100.92 | o1308.shared.klaviyomail.com |
11 | 1 | Check → |
| 168.245.31.178 | o1328.shared.klaviyomail.com |
6 | — | Check → |
| 149.72.95.9 | o1398.shared.klaviyomail.com |
5 | 1 | Check → |
| 149.72.167.101 | o1397.shared.klaviyomail.com |
5 | — | Check → |
| 149.72.226.45 | o1400.shared.klaviyomail.com |
4 | — | Check → |
| 168.245.125.63 | o1401.shared.klaviyomail.com |
3 | — | Check → |
| 149.72.197.103 | o1375.shared.klaviyomail.com |
3 | — | Check → |
| 167.89.1.244 | o1356.shared.klaviyomail.com |
1 | — | Check → |
| 149.72.90.8 | o1396.shared.klaviyomail.com |
1 | — | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
flowium.com | SendGrid 73 Klaviyo 65 Mailgun 33 Customer.io 28 Amazon SES 28 SparkPost 28 HubSpot 13 Beehiiv 9 Substack 8 Salesforce MC 7 Shopify Messaging 3 Epsilon 1 Brevo 1 |