Google and Microsoft killed basic SMTP authentication. Kinplug Mail doesn't care — it was built on OAuth 2.0 from day one. Gmail and Microsoft 365, shared mailbox support, delegated Send As, scheduled send, conditional automation, per-field attachment selection. All configured inside Kintone.
Gmail (including Workspace) and Microsoft 365 (including Exchange Online) via OAuth 2.0. We never store your SMTP password. Auto token refresh. Neither Google's nor Microsoft's auth shutdowns touch you.
Proper Send As via Microsoft 365 Exchange Admin delegation. Send from personal mailboxes with delegation, or directly from shared mailboxes. Both modes supported.
Triggers (record added, status changed, scheduled), conditions, chained actions — designed in GUI. Zapier/Make-equivalent automation running inside your Kintone.
Choose exactly which attachment fields get included. "Attach the quote PDF but not the internal-notes PDF" — that specific. Dynamically-generated PDFs from PDF Pro are supported.
List-view bulk send with query conditions. We bypass Kintone's 10,000-record API offset limit with a custom pagination routine, so large campaigns ship in one click. Logs persist in your Kintone.
Point-in-time scheduling, recurring rules ("first of month", "Friday 5pm"), and duplicate-run locks. Designed timezone-aware from day one. Accurate in JST, UTC, or anything else.
| Dimension | Kinplug Mail | Major SMTP-based mail plugin | In-house JavaScript |
|---|---|---|---|
| OAuth 2.0 authentication | ✓ Gmail + Microsoft 365 | × SMTP basic auth only | △ requires custom build |
| Works after April 2026 | ✓ unaffected | × Microsoft 365 sending stops | × requires rework |
| Shared mailbox sending | ✓ Send As supported | △ single-credential only | × |
| Configuration location | ✓ inside Kintone | × external portal | ✓ in-code |
| Visual workflow | ✓ GUI builder | × none | × none |
| Cost | ¥9,800 all plugins | ¥6,000+ | engineering cost |
Kinplug Mail installs from Kintone's plugin management UI by uploading a .zip — then you authorize OAuth with Google or Microsoft once. That's the setup. If you're migrating from another mail plugin, we preserve your templates, recipient logic, and sender configurations.
The 14-day trial runs in your actual environment with full feature access. If your procurement team needs specific documents for approval, tell us what you need via the contact form.
Sign in with Google or Microsoft, enter your Kintone subdomain, install the plugin. Live in 90 seconds.