Google Add-on
Personalized email merge engine operating directly from Google Sheets via native Gmail quotas. Zero external mail-relay servers, zero inbox snooping, and zero recurring subscriptions.
[00:00.0–00:08.0]: Need a simpler way to handle sending personalized mail merges from Google Sheets without creating another account or handing your data to an external cloud?
[00:08.0–00:18.3]: Watch MailSync Shield in action: Dispatches your personalized campaigns without requesting access to read your existing Gmail messages, threads, or private attachments.
[00:18.3–00:37.6]: Stamps each row in your Sheet the instant an email sends—so if you pause or resume a large list, already-contacted recipients are never emailed twice. Plus, preview exact token replacements with a one-click test email to your own address before dispatching to your client, donor, or attendee list.
[00:37.6–00:46.0]: Every email goes straight from your authenticated Google account to your recipient—no third-party SMTP relays and no promotional watermarks.
[00:46.0–00:55.8]: Software that lives where you do. No accounts, no tracking, and zero cloud rent—at 864zeros.com.
[00:00.0–00:08.0]: Tired of sending personalized mail merges from Google Sheets getting locked behind monthly subscriptions and external login portals?
[00:08.0–00:13.7]: With MailSync Shield, Strict Send-Only Permission Boundary runs right where you already work.
[00:13.7–00:23.4]: Crash-Proof Resume & Duplicate-Send Prevention and Test-to-Self Preview & Custom {{Column}} Tokens—privately under your own control.
[00:23.4–00:33.2]: Software that lives where you do. No accounts, no tracking, and zero cloud rent—at 864zeros.com.
Sends personalized HTML emails directly from your Google Sheet rows through your own Gmail account—using strictly send-only permissions so the add-on can never read your private inbox.
Most mail merge add-ons demand full permission to read, modify, and delete every email in your Gmail inbox—and charge recurring yearly rent to remove their footer ads. MailSync Shield uses send-only permissions, includes zero watermarks, and unlocks forever once.
Step through a quick 1 → 2 → 3 hands-on preview right here in your browser—no sign-in and nothing to install first.
Dispatches your personalized campaigns without requesting access to read your existing Gmail messages, threads, or private attachments.
Stamps each row in your Sheet the instant an email sends—so if you pause or resume a large list, already-contacted recipients are never emailed twice.
Preview exact token replacements with a one-click test email to your own address before dispatching to your client, donor, or attendee list.
Every email goes straight from your authenticated Google account to your recipient—no third-party SMTP relays and no promotional watermarks.