Ahrefs uses Mailchimp for marketing email and SendGrid for transactional/notifications. They rank #2,167 in the Tranco list of most-popular domains. We've also observed sends via Amazon SES. Their email authentication setup is good (score 80/100). We've recorded 9 ESP changes 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 10 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to ahrefs.com. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: 91% of observed emails use an aligned return-path (em5183.ahrefs.com, outbound.intercom.ahrefs.com, bounce.ahrefs.com); the rest use third-party paths (dignitas.fund, tooltester.com, mail54.sea61.rsgsv.net) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 212 observed emails sign with a domain aligned with ahrefs.com (ahrefs.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 89% TLS 1.3 (across 105 sends).
Delivery: fast — 94% of emails in the last 7 days arrive in under 10 seconds (across 16 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Intercom 24 Amazon SES 7ESPs 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: ahrefs.com, em5183.ahrefs.com, dignitas.fund, mail54.sea61.rsgsv.net, bounce.ahrefs.com, outbound.intercom.ahrefs.com, tooltester.com, mail55.suw13.rsgsv.net, mail30.atl261.mcdlv.net, email.ahrefs.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 | 190 | 92.2% |
| promotions | 16 | 7.8% |
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 % |
|---|---|---|---|---|---|
| Amazon SES | 7 | 57.1% | 42.9% | 0.0% | |
| Intercom | 19 | 52.6% | 47.4% | 0.0% | |
| Mailchimp | 3 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 145 | 97.2% | 2.8% | 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 ahrefs.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 149.72.123.226 | wrqvtbzn.outbound-mail.sendgrid.net |
78 | 7 | Check → |
| 159.183.153.36 | wfbtwwnq.outbound-mail.sendgrid.net |
77 | 6 | Check → |
| 198.37.151.189 | o1.email.ahrefs.com |
76 | 5 | Check → |
| 192.174.84.116 | mta-174-84-116.intercom.com.sparkpostmail.com |
10 | 2 | Check → |
| 192.174.84.115 | mta-174-84-115.intercom.com.sparkpostmail.com |
7 | 1 | Check → |
| 54.240.42.184 | a42-184.smtp-out.amazonses.com |
4 | 3 | Check → |
| 54.240.61.167 | a61-167.smtp-out.us-west-2.amazonses.com |
3 | — | Check → |
| 148.105.14.54 | mail54.sea61.rsgsv.net |
2 | — | Check → |
| 198.2.183.55 | mail55.suw13.rsgsv.net |
2 | — | Check → |
| 198.2.142.30 | mail30.atl261.mcdlv.net |
1 | 1 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
ahrefs.com | SendGrid 257 Intercom 24 Amazon SES 7 Mailchimp 3 |
