Similarweb uses Salesforce MC for marketing email and SendGrid for transactional/notifications. They rank #3,361 in the Tranco list of most-popular domains. We've also observed sends via Mailgun. Email goes out from 2 different subdomains. 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 easydmarc.asia. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: all 66 observed emails use a return-path aligned with similarweb.com (bounce.digital.similarweb.com, email.similarweb.com, gh-mail.similarweb.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 64 observed emails sign with a domain aligned with similarweb.com (digital.similarweb.com, similarweb.com, gh-mail.similarweb.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 97% TLS 1.3 (across 35 sends).
Delivery (last 7 days): 73% under 10 seconds, 9% over 1 minute (across 11 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Mailgun 1ESPs 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: similarweb.com, email.similarweb.com, bounce.digital.similarweb.com, gh-mail.similarweb.com, digital.similarweb.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 | 41 | 68.3% |
| promotions | 19 | 31.7% |
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 | 41 | 53.7% | 46.3% | 0.0% | |
| Mailgun | 1 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 14 | 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 similarweb.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 161.71.68.46 | mta.digital.similarweb.com |
54 | 15 | Check → |
| 159.183.201.183 | wfbtcwbt.outbound-mail.sendgrid.net |
6 | 1 | Check → |
| 168.245.70.147 | xvfrqswp.outbound-mail.sendgrid.net |
5 | — | Check → |
| 168.245.79.15 | xvfrqfhf.outbound-mail.sendgrid.net |
3 | — | Check → |
| 167.89.75.95 | xtrwqbrf.outbound-mail.sendgrid.net |
1 | — | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
digital.similarweb.com | Salesforce MC 54 | |
similarweb.com | SendGrid 15 Mailgun 1 |
