Ihg uses Salesforce MC as their primary email service provider. They rank #2,402 in the Tranco list of most-popular domains. Email goes out from 2 different subdomains. Their email authentication setup is good (score 73/100). Missing: DMARC enforcement.
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 7 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to dmarcian. Policy
p=none is monitor-only — receivers won't act on spoofing yet.
SPF alignment: all 39 observed emails use a return-path aligned with ihg.com (bounce.mc.ihg.com, bounce.tx.ihg.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 33 observed emails sign with a domain aligned with ihg.com (mc.ihg.com, tx.ihg.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 100% TLS 1.3 (across 12 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 2 sends).
Inbox actions: EmailMessage — schema.org markup Gmail renders as inline buttons.
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: ihg.com, bounce.mc.ihg.com, bounce.tx.ihg.com, mc.ihg.com, tx.ihg.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 | 35 | 87.5% |
| promotions | 5 | 12.5% |
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 % |
|---|---|---|---|---|---|
| Salesforce MC | 39 | 89.7% | 10.3% | 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 ihg.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 13.111.173.5 | mta4.mc.ihg.com |
4 | 1 | Check → |
| 13.111.173.3 | mta2.mc.ihg.com |
3 | — | Check → |
| 13.111.173.17 | mta16.mc.ihg.com |
3 | — | Check → |
| 13.111.173.21 | mta20.mc.ihg.com |
3 | 1 | Check → |
| 13.111.173.13 | mta12.mc.ihg.com |
3 | — | Check → |
| 13.111.173.9 | mta8.mc.ihg.com |
2 | — | Check → |
| 13.111.173.23 | mta2.tx.ihg.com |
2 | 1 | Check → |
| 13.111.173.11 | mta10.mc.ihg.com |
2 | — | Check → |
| 13.111.173.22 | mta21.mc.ihg.com |
2 | — | Check → |
| 13.111.173.19 | mta18.mc.ihg.com |
2 | — | Check → |
| 13.111.173.14 | mta13.mc.ihg.com |
2 | 1 | Check → |
| 13.111.173.18 | mta17.mc.ihg.com |
1 | — | Check → |
| 13.111.173.15 | mta14.mc.ihg.com |
1 | — | Check → |
| 13.111.173.10 | mta9.mc.ihg.com |
1 | — | Check → |
| 13.111.173.6 | mta5.mc.ihg.com |
1 | — | Check → |
| 13.111.173.16 | mta15.mc.ihg.com |
1 | — | Check → |
| 13.111.173.2 | mta.mc.ihg.com |
1 | 1 | Check → |
| 13.111.173.24 | mta3.tx.ihg.com |
1 | 1 | Check → |
| 13.111.173.25 | mta4.tx.ihg.com |
1 | 1 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
mc.ihg.com | Salesforce MC 35 | |
tx.ihg.com | Salesforce MC 5 |
