Email Detective — ESP Tracker

Service

service.gov.uk ↗

🏆Rank #680 🏷 Nonprofit 🇬🇧United Kingdom ✓ Inbox 97%

Service uses Amazon SES as their primary email service provider. They rank #680 in the Tranco list of most-popular domains. Email goes out from 6 different subdomains. Their email authentication setup is solid (score 85/100).

Transactional ESPAmazon SES

Total observations40

Active days24

Avg per active day1.7

Last activity📬 Active · 5 days ago

Cadence~every 3 months

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 7 emails we've observed. DMARC policy is read live from DNS.

DMARC reports sent to service.gov.uk. Policy p=reject means receivers actively block or quarantine spoofed mail.

SPF alignment: 91% of observed emails use an aligned return-path (mail.notifications.service.gov.uk, mail.access.service.gov.uk, smtp.confirmation.tax.service.gov.uk); the rest use third-party paths (eu-west-1.amazonses.com, eu-west-2.amazonses.com) where DMARC has to rely on DKIM alignment.

DKIM alignment: all 32 observed emails sign with a domain aligned with service.gov.uk (notifications.service.gov.uk, access.service.gov.uk, taxdisc.service.gov.uk). DKIM authenticates the visible From — supports DMARC directly.

TLS: modern — 100% TLS 1.3 (across 13 sends).

Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 6 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.

Amazon SES ✓ 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.

Mailgun Microsoft 365

Probed: service.gov.uk, mail.notifications.service.gov.uk, mail.access.service.gov.uk, eu-west-2.amazonses.com, eu-west-1.amazonses.com, smtp.tax.service.gov.uk, smtp.confirmation.tax.service.gov.uk, notifications.service.gov.uk, tax.service.gov.uk, access.service.gov.uk, registertovote.service.gov.uk, taxdisc.service.gov.uk

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.

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.

Monthly 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 service.gov.uk has been observed sending from, and where their mail landed in Gmail.

Sending domains