ActiveCampaign uses ActiveCampaign for marketing email and SendGrid for transactional/notifications. They rank #10,683 in the Tranco list of most-popular domains. We've also observed sends via Postmark. Email goes out from 6 different subdomains. Their email authentication setup is solid (score 85/100). We've recorded 2 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.
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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 DMARC Digests. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: 22% of observed emails use an aligned return-path (pm-bounces.activecampaign.com, out.activecampaign.com, em3689.activecampaign.com); the rest use third-party paths (adsalsagroup.com, gmail.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 203 observed emails sign with a domain aligned with activecampaign.com (activecampaign.com, mail26.euc1.acems2.com, s2.csa2.acemsb2.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 100% TLS 1.3 (across 105 sends).
7 of 39 emails in the last 7 days were delayed beyond 5 minutes (18%) — peaks crossed 4 hours, which usually means stalled queues or hard receiver throttling. Slow sends averaged 2 h 55 min, peaked at 5 h 44 min. Healthy senders deliver in under 30 seconds. Consistent delays usually mean greylisting, reputation-based throttling, or receiver-side filter scrutiny — worth investigating sender reputation and authentication setup.
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Postmark 11 Zendesk 10ESPs 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: activecampaign.com, pm-bounces.activecampaign.com, em3689.activecampaign.com, adsalsagroup.com, gmail.com, out.activecampaign.com, s2.csa2.acemsb2.com, 3497311.myactivecampaign.com, mail219.euc1.acems3.com, mail26.euc1.acems2.com, mail194.euc1.acems2.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 | 230 | 91.6% |
| promotions | 6 | 2.4% |
| spam | 15 | 6.0% |
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 % |
|---|---|---|---|---|---|
| Zendesk | 8 | 75.0% | 0.0% | 25.0% | |
| ActiveCampaign | 182 | 93.4% | 0.0% | 6.6% | |
| Postmark | 10 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 13 | 69.2% | 30.8% | 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 activecampaign.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 52.128.41.226 | d82.asa.acemsd2.com |
13 | 5 | Check → |
| 50.31.205.203 | mta203-ab1.mtasv.net |
6 | — | Check → |
| 104.245.209.202 | mta202a-ord.mtasv.net |
3 | 1 | Check → |
| 104.245.209.200 | mta200a-ord.mtasv.net |
3 | 2 | Check → |
| 104.245.209.231 | mta231b-ord.mtasv.net |
3 | 2 | Check → |
| 50.31.205.205 | mta205-ab1.mtasv.net |
3 | — | Check → |
| 104.245.209.201 | mta201a-ord.mtasv.net |
3 | 3 | Check → |
| 50.31.205.206 | mta206-ab1.mtasv.net |
2 | — | Check → |
| 104.245.209.246 | mta246b-ord.mtasv.net |
2 | — | Check → |
| 192.92.97.228 | s6.acemsrve.com |
2 | — | Check → |
| 104.245.209.237 | mta237b-ord.mtasv.net |
2 | 1 | Check → |
| 103.229.233.14 | mail14.apse2.acems1.com |
2 | — | Check → |
| 104.245.209.235 | mta235b-ord.mtasv.net |
1 | — | Check → |
| 50.31.205.204 | mta204-ab1.mtasv.net |
1 | — | Check → |
| 188.172.138.43 | mta-out13.pod28.euc1.zdsys.com |
1 | 1 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
activecampaign.com | ActiveCampaign 83 SendGrid 13 Postmark 11 Zendesk 10 | 🚨 7/21 extreme delay (avg 2 h 55 min, peak 5 h 44 min) |
s2.csa2.acemsb2.com | ActiveCampaign 61 | |
mail26.euc1.acems2.com | ActiveCampaign 50 | |
mail219.euc1.acems3.com | ActiveCampaign 27 | |
mail194.euc1.acems2.com | ActiveCampaign 5 | |
3497311.myactivecampaign.com | ActiveCampaign 1 |