Zeffy uses Brevo for marketing email and SendGrid for transactional/notifications. They rank #11,565 in the Tranco list of most-popular domains. We've also observed sends via HubSpot. Email goes out from 4 different subdomains. Their email authentication setup is good (score 80/100). We've recorded 1 ESP change 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 5 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to cloudflare.net. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: 38% of observed emails use an aligned return-path (em5106.transaction.mailer.zeffy.com, em957.edge.mailer.zeffy.com); the rest use third-party paths (dignitas.fund, bf03.hubspotemail.net) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 15 observed emails sign with a domain aligned with zeffy.com (email.zeffy.com, newsletter.zeffy.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 89% TLS 1.3 (across 9 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 5 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
HubSpot 3ESPs 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: zeffy.com, dignitas.fund, bf03.hubspotemail.net, em5106.transaction.mailer.zeffy.com, em957.edge.mailer.zeffy.com, email.zeffy.com, newsletter.zeffy.com, transaction.mailer.zeffy.com, edge.mailer.zeffy.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 | 23 | 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 % |
|---|---|---|---|---|---|
| SendGrid | 6 | 100.0% | 0.0% | 0.0% | |
| Brevo | 10 | 100.0% | 0.0% | 0.0% | |
| HubSpot | 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 zeffy.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 172.246.18.225 | email.zeffy.com |
8 | 1 | Check → |
| 149.72.135.192 | wrqvvtch.outbound-mail.sendgrid.net |
3 | — | Check → |
| 149.72.235.68 | wrqvzbqq.outbound-mail.sendgrid.net |
2 | — | Check → |
| 143.244.90.33 | bd77gdv.bf03.hubspotemail.net |
1 | — | Check → |
| 149.72.83.2 | wrqvrphn.outbound-mail.sendgrid.net |
1 | — | Check → |