Email Detective — ESP Tracker

Constant Contact

constantcontact.com ↗

🏆Rank #2,146 🏷 SaaS 🇺🇸United States ✓ Inbox 92%

Constant Contact uses Constant Contact as their primary email service provider. They rank #2,146 in the Tranco list of most-popular domains. We've also observed sends via Salesforce MC. Email goes out from 29 different subdomains. Their email authentication setup is solid (score 85/100). We've recorded 2 ESP changes since first observing this brand.

Marketing ESPConstant Contact

Total observations235

Active days48

Avg per active day4.9

Last activity📬 Active · 2 days ago

Cadence~weekly

Other technologies

Non-ESP tools detected in this brand's emails. Independent of who sends — a brand can use any combination.

HTML builder

Beefree SDK

Email setup 85/100

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 dmarcian. Policy p=reject means receivers actively block or quarantine spoofed mail.

SPF alignment: all 232 observed emails use a return-path aligned with constantcontact.com (in.constantcontact.com, bounce.c.constantcontact.com, mail.identity.constantcontact.com). SPF authenticates the visible From — supports DMARC directly.

DKIM alignment: all 201 observed emails sign with a domain aligned with constantcontact.com (shared1.ccsend.com, c.constantcontact.com, stockwirenews-net.ccsend.com). DKIM authenticates the visible From — supports DMARC directly.

TLS: modern — 100% TLS 1.3 (across 94 sends).

Delivery: fast — 89% of emails in the last 7 days arrive in under 10 seconds (across 19 sends).

Other ESPs detected

Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).

Confirmed senders

ESPs 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.

Constant Contact ✓ confirmed Salesforce MC ✓ confirmed

Other SPF authorizations

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.

Google Workspace SendGrid

Probed: constantcontact.com, bounce.c.constantcontact.com, in.constantcontact.com, mail.identity.constantcontact.com, shared1.ccsend.com, c.constantcontact.com, horizonintegratedwellnessgroup.ccsend.com, baker1031.ccsend.com, grandcru.ccsend.com, thegreatnewyorkstatefair.ccsend.com, kryptonstreet.ccsend.com, reviewr.ccsend.com

Where emails landed (Gmail)

Folder distribution across all emails from this brand observed in Gmail inboxes. High inbox % = good deliverability; spam appearances are the headline signal.

Where emails landed (Outlook)

Placement observed in Outlook / Microsoft 365 mailboxes. Focused Inbox splits mail into two tabs, "Focused" (inbox) and "Other", plus Junk. 0% reached the Focused inbox across 1 observed email.

Placement by ESP

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.

Daily observations per ESP. Brands often run multiple ESPs concurrently — marketing on one, transactional on another — so this chart shows usage rather than switches.

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Sending IPs

IP addresses constantcontact.com has been observed sending from, and where their mail landed in Gmail.

Sending domains