hub Integrations

Bring any inbox. Connect in two minutes.

Native OAuth for the providers your team actually uses. Standards-compliant SMTP + IMAP for the long tail. ESP-specific tuning for the deliverability quirks you'd otherwise lose a week debugging.

Native providers

One-click OAuth into the big two.

Push subscriptions, scoped tokens, automatic refresh. You authorise once and Warmup keeps the connection healthy in the background.

G
Gmail
Personal Gmail accounts via OAuth. Up to 500 sends/day per inbox.
W
Google Workspace
Workspace tenants via admin-consent OAuth. Up to 2 000 sends/day.
M
Microsoft 365
Microsoft Graph with push subscriptions for real-time delivery events.
O
Outlook.com
Personal Outlook + Hotmail accounts via OAuth. SNDS + JMRP signals pulled in.
SMTP + IMAP

Standards-compliant for the long tail.

Anything that speaks SMTP works. Optional IMAP for reply detection + folder moves — strongly recommended for full warmup signal.

Z
Zoho Mail
App password + SMTP/IMAP. Auto-detected from MX records.
F
Fastmail
App-specific password. Pre-filled SMTP/IMAP host on detection.
P
ProtonMail Bridge
Connect via Proton Bridge for full SMTP+IMAP support.
M
Mailbox.org
EU-hosted privacy-focused provider. Standard SMTP/IMAP setup.
H
Hey.com
App password + SMTP/IMAP. Smart folder behaviour respected.
M
Mailcow + Mailu
Self-hosted mail servers. Bring your own SMTP/IMAP credentials.
P
cPanel + Plesk
Hosted mail on any cPanel or Plesk box. Custom SMTP path.
S
Any SMTP server
Custom host + port + STARTTLS/TLS. Optional IMAP for full warmup signal.
Seed list — receiving side

15 real mailboxes we operate, ready to score your placement.

Run a placement test from any connected inbox and we measure inbox / promotions / spam landing across the full set, per ESP bucket.

G
Gmail
Personal Gmail bucket — main + Promotions + Spam reporting.
Google
W
Workspace seed
G-Workspace tenant seed — separate Postmaster Tools signal.
Google
H
Hotmail / Outlook
Microsoft consumer bucket — Junk Mail + Focused/Other.
Microsoft
M
M365 seed
Business tenant seed — JMRP filter signal.
Microsoft
Y
Yahoo Mail
Yahoo consumer bucket — Spam folder + reputation curve.
Yahoo
A
AOL Mail
Shares Yahoo's filter — separate seed for reputation tracking.
Yahoo
I
iCloud Mail
Apple Mail Privacy Protection — open metrics are noise here.
Apple
Y
Yandex Mail
Cyrillic ESP bucket — important for CEE outreach.
Other
M
Mail.ru
Major Russian ESP — separate filter behaviour.
Other
Z
Zoho Mail
Business mailbox — common in SMB outreach.
Other
P
ProtonMail
Encrypted EU mailbox — privacy-focused recipients.
Other
G
GMX
German consumer ESP — relevant for DACH outreach.
Other
F
Fastmail
Indie hosted email — pro / privacy market signal.
Other
M
Mailbox.org
EU privacy-focused provider.
Other
H
Hey.com
Basecamp's opinionated inbox — unique filter behavior.
Other
Automation

Plug Warmup into the tools you already run.

api

REST API Pro+

OpenAPI 3.1 schema, per-tenant API keys with role-scoped permissions. List mailboxes, kick off placement tests, pull the latest reputation snapshot.

webhook

Webhooks Max

Subscribe to reputation drops, blacklist hits, placement-test completions. Signed payloads — replay-resistant out of the box.

extension

Zapier / n8n / Make

Standard JSON + predictable status codes — any iPaaS that speaks REST can drive Warmup. Slack alerts, Notion logs, your own ETL — your call.

Don't see your provider?

Anything that speaks SMTP works. Tell us what you'd like us to support natively next.

play_arrow Connect your first mailbox
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