Studyportalsmail uses Customer.io

Studyportalsmail uses Customer.io as their primary email service provider. Their email authentication setup is good (score 73/100). Missing: DMARC enforcement.

Marketing ESP

Customer.io

Total observations5

Active days2

Avg per active day2.5

Last activity📬 Active · 5 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
AMP for Email	Yes

Compare Studyportalsmail with another brand:

Email setup 73/100

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.

✓

Solid setup, room to improve

Most authentication signals are present. A couple of pieces would tighten things up.

73/100

SPF

pass

DKIM

pass

DMARC

pass (none)

BIMI

none

Unsubscribe

one-click

SPF lookups 6/10

SPF / DKIM / DMARC above reflect the last 5 emails we've observed. DMARC policy is read live from DNS.

Authentication

DMARC reports sent to smtpeter.com. Policy p=none is monitor-only — receivers won't act on spoofing yet.

SPF alignment: all 5 observed emails use a return-path aligned with studyportalsmail.com (cioeu86254.accounts.studyportalsmail.com). SPF authenticates the visible From — supports DMARC directly.

DKIM alignment: all 5 observed emails sign with a domain aligned with studyportalsmail.com (cioeu86254.accounts.studyportalsmail.com). DKIM authenticates the visible From — supports DMARC directly.

Transport & deliverability

TLS: 0% TLS 1.3, 100% TLS 1.2 (across 5 sends).

Other ESPs detected

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

None — only the primary ESP(s) shown above

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.

Customer.io ✓ via Mailgun

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.

Mailgun

Probed: studyportalsmail.com, cioeu86254.accounts.studyportalsmail.com, accounts.studyportalsmail.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.

Folder	Count	Share
inbox	5	100.0%

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.

ESP	Emails	Placement	Inbox %	Tabs %	Spam %
Customer.io	5		100.0%	0.0%	0.0%

ESP activity over time

Jun 19 – Jun 26, 2026 · 2 days with sends

Last 30d Last 90d

By ESP By inbox/spam

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