Squarespace uses Iterable for marketing email and SendGrid for transactional/notifications. They rank #620 in the Tranco list of most-popular domains. We've also observed sends via SparkPost. Email goes out from 2 different subdomains. 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.
| AMP for Email | Yes |
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 1 email we've observed. DMARC policy is read live from DNS.
DMARC reports sent to Agari (Proofpoint). Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: all 35 observed emails use a return-path aligned with squarespace.com (bounce.squarespace.com, em8783.squarespace.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 35 observed emails sign with a domain aligned with squarespace.com (mail.squarespace.com, squarespace.com). DKIM authenticates the visible From — supports DMARC directly.
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
SparkPost 6 Zendesk 2ESPs 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: squarespace.com, em8783.squarespace.com, bounce.squarespace.com, mail.squarespace.com, em.squarespace.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 | 40 | 78.4% |
| promotions | 11 | 21.6% |
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 % |
|---|---|---|---|---|---|
| Iterable | 18 | 61.1% | 38.9% | 0.0% | |
| SendGrid | 13 | 100.0% | 0.0% | 0.0% | |
| Zendesk | 2 | 100.0% | 0.0% | 0.0% |
Monthly 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 squarespace.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 156.70.24.206 | mta-70-24-206.sparkpostmail.com |
20 | 1 | Check → |
| 156.70.24.207 | mta-70-24-207.sparkpostmail.com |
12 | — | Check → |
| 167.89.18.115 | o3.em.squarespace.com |
10 | — | Check → |
| 167.89.101.142 | o5.em.squarespace.com |
7 | — | Check → |
| 192.161.151.9 | mta-out9.pod13.usw2.zdsys.com |
1 | — | Check → |
| 192.161.151.1 | mta-out1.pod13.usw2.zdsys.com |
1 | — | Check → |