Taxdown uses Customer.io as their primary email service provider. They rank #231,680 in the Tranco list of most-popular domains. Their email authentication setup is solid (score 85/100). We've recorded 1 ESP change 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.
DMARC enforced with p=reject — receivers actively reject or quarantine spoofed mail. No aggregate reporting destination configured.
SPF alignment: all 12 observed emails use a return-path aligned with taxdown.es (cioeu48318.taxdown.es, outbound.intercom.taxdown.es). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 12 observed emails sign with a domain aligned with taxdown.es (cioeu48318.taxdown.es, taxdown.es). DKIM authenticates the visible From — supports DMARC directly.
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Intercom 6ESPs 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: taxdown.es, cioeu48318.taxdown.es, outbound.intercom.taxdown.es
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 | 10 | 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 % |
|---|---|---|---|---|---|
| Customer.io | 5 | 100.0% | 0.0% | 0.0% | |
| Intercom | 5 | 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 taxdown.es has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Reputation |
|---|---|---|---|
| 192.174.84.146 | mta-174-84-146.intercom.com.sparkpostmail.com |
4 | Check → |
| 198.244.60.104 | a104.a5d06dfa.euw1.send.eu.mailgun.net |
3 | Check → |
| 141.193.33.180 | v5180.v5c07f50a.euw1.send.eu.mailgun.net |
3 | Check → |
| 192.174.84.111 | mta-174-84-111.intercom.com.sparkpostmail.com |
1 | Check → |
| 192.174.84.113 | mta-174-84-113.intercom.com.sparkpostmail.com |
1 | Check → |
Per-IP inbox / promotions / spam is being collected and will appear here as new emails are observed.
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
taxdown.es | Customer.io 6 Intercom 6 |
