Gong uses Marketo for marketing email and Mailgun for transactional/notifications. They rank #14,050 in the Tranco list of most-popular domains. 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 cloudflare.net. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: all 12 observed emails use a return-path aligned with gong.io (emails.gong.io). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 321 observed emails sign with a domain aligned with gong.io (gong.io). DKIM authenticates the visible From — supports DMARC directly.
TLS: 3% TLS 1.3, 97% TLS 1.2 (across 172 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 54 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: gong.io, emails.gong.io
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 | 349 | 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 % |
|---|---|---|---|---|---|
| Mailgun | 318 | 100.0% | 0.0% | 0.0% | |
| Marketo | 12 | 100.0% | 0.0% | 0.0% |
Weekly 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 gong.io has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 69.72.39.39 | v539.v52b565a7.use4.send.mailgun.net |
367 | 75 | Check → |
| 199.15.215.82 | em-sj-82.mktomail.com |
4 | 2 | Check → |
| 199.15.214.45 | em-sj-45.mktomail.com |
3 | — | Check → |
| 199.15.214.47 | em-sj-47.mktomail.com |
2 | — | Check → |
| 199.15.214.48 | em-sj-48.mktomail.com |
2 | — | Check → |
| 199.15.215.229 | leopard.mktdns.com |
1 | — | Check → |
| 199.15.214.199 | em-sj-99.mktomail.com |
1 | 1 | Check → |