Dub uses Amazon SES — ESP Tracker

Dub uses Amazon SES as their primary email service provider. They rank #106,126 in the Tranco list of most-popular domains. We've also observed sends via Resend. Email goes out from 2 different subdomains. Their email authentication setup is solid (score 87/100).

Transactional ESP

Amazon SES

Total observations120

Active days38

Avg per active day3.2

Last activity📬 Active · 7 days ago

Cadence~every 2 days

Compare Dub with another brand:

Email setup 87/100

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.

✓

Strong email setup

Authentication is in good shape — SPF, DKIM, and DMARC enforcement all configured.

87/100

SPF

pass

DKIM

pass

DMARC

pass (quarantine)

BIMI

verified VMC

Unsubscribe

standard

SPF lookups 4/10

SPF / DKIM / DMARC above reflect the last 9 emails we've observed. DMARC policy is read live from DNS.

Authentication

DMARC reports sent to dub.co. Policy p=quarantine means receivers actively block or quarantine spoofed mail.

SPF alignment: all 102 observed emails use a return-path aligned with dub.co (send.mail.dub.co, bounces.ship.dub.co). SPF authenticates the visible From — supports DMARC directly.

DKIM alignment: all 87 observed emails sign with a domain aligned with dub.co (mail.dub.co, ship.dub.co). DKIM authenticates the visible From — supports DMARC directly.

Brand visibility

VMC issued by: digicert.

Transport & deliverability

TLS: modern — 100% TLS 1.3 (across 37 sends).

Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 2 sends).

Other ESPs detected

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

Resend 6

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

Resend ✓ via Amazon SES

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

Probed: dub.co, send.mail.dub.co, bounces.ship.dub.co, mail.dub.co, ship.dub.co

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	62	76.5%
promotions	19	23.5%

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 %
Amazon SES	59		71.2%	28.8%	0.0%
Resend	5		60.0%	40.0%	0.0%

ESP activity over time

Jun 1 – Jun 23, 2026 · 18 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.