Vivaldi uses Mailgun — ESP Tracker

Vivaldi uses Mailgun as their primary email service provider. They rank #7,016 in the Tranco list of most-popular domains. Their email authentication setup is good (score 77/100).

Transactional ESP

Mailgun

Total observations6

Active days4

Avg per active day1.5

Last activity📬 Active · 6 days ago

Cadence~weekly

Compare Vivaldi with another brand:

Email setup 77/100

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.

77/100

SPF

pass

DKIM

pass

DMARC

pass (reject)

BIMI

none

Unsubscribe

standard

SPF lookups 1/10

SPF / DKIM / DMARC above reflect the last 1 email we've observed. DMARC policy is read live from DNS.

Authentication

DMARC reports sent to vivaldi.com. Policy p=reject means receivers actively block or quarantine spoofed mail.

DKIM alignment: all 6 observed emails sign with a domain aligned with vivaldi.com (newsletter.vivaldi.com). DKIM authenticates the visible From — supports DMARC directly.

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.

Mailgun observed

"Observed" pills mean we detected emails from these ESPs, but they don't appear in any SPF record we probed. They may still be properly authorized — sending infrastructure can live on subdomains we haven't seen yet, or use IP-listing instead of include: directives.

Other SPF authorizations

No additional ESPs authorized in the brand's SPF beyond the confirmed senders above.

Probed: vivaldi.com, newsletter.vivaldi.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	6	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 %
Mailgun	6		100.0%	0.0%	0.0%

ESP activity over time

May 22 – Jun 24, 2026 · 4 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.