Bulk email software · Windows

Bulk email software. Bulk email marketing platform.

Q: What is Brahmastra Mailer?

Brahmastra Mailer is a suite of licensed Windows bulk sending applications. Each app opens isolated Google Chrome profiles so your team can send Gmail, Xero invoices, documents, or Shopify mail without mixing that work into a personal browser.

Q: Which bulk sending apps can I download?

Downloads include Manual Sender for Gmail, Invoice Automation for bulk Xero invoice email, One Sender and SignEasy for documents, G-Api for Gmail API campaigns, and Shopify Automation. You sign in with a Brahmastra license from this site.

Q: How does Invoice Automation bulk-send Xero invoices?

Invoice Automation fills Xero invoices and the Send email dialog: one recipient in To and up to 19 addresses in BCC (20 emails per organisation), then continues with the next organisation using your signed-in Xero account.

Q: Is this for unsolicited bulk email?

No. You send from accounts you control and must follow Gmail, Xero, and other platform terms plus applicable law. Brahmastra Mailer does not provide harvested lists or a spam service.

Brahmastra Mailer is licensed bulk email software for Windows 10 and 11 — a Gmail bulk email sender, mass email software for Xero invoices, an email sending API (Gmail API), and document campaigns. Isolated Chrome profiles keep bulk sending off your everyday browser.

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Bulk sending

Built for volume sending on isolated Chrome.

Each product is a Windows bulk sending application: named profiles, a locked Chrome session, and a panel that drives the live website — Gmail, Xero, document platforms, or Shopify — while you stay signed in as yourself.

Gmail bulk sender

Manual Sender opens Gmail in a clean profile with a floating panel for recipient lists, subject, body, attachments, pause, and resume.

Xero bulk invoices

Invoice Automation creates invoices and sends them in batches: one To address plus 19 BCC, then a new Xero organisation, using your logged-in account.

Documents & shops

One Sender and SignEasy bulk-send files through the sites you already use. G-Api and Shopify cover API mail and store operations on the same license model.

Setup

Three steps on a Windows PC.

Each bulk sending app is a single EXE. First launch unpacks the extension into Local App Data and keeps Chrome profiles out of Downloads.

01

Install Chrome

Use the Google Chrome already on the machine. Brahmastra Mailer does not ship a separate browser.

02

Sign in to the app

Licensed builds open with the email and password from this website. Session tokens stay on that Windows user account.

03

Open a profile and send

Create & Open launches Gmail, Xero, or the chosen platform with the sender loaded. Sign in to that web account inside the profile, then run your bulk send.

FAQ

Bulk sending software, explained.

Short answers for operators comparing Windows bulk email and invoice senders.

What is Brahmastra Mailer?

A licensed suite of Windows bulk sending applications. Isolated Chrome profiles keep Gmail, Xero, documents, and Shopify sending off your personal browser.

Which bulk sending apps can I download?

Manual Sender, Invoice Automation, One Sender, SignEasy, G-Api, and Shopify Automation. Current builds are on Downloads. New accounts need admin approval before the apps will log in.

How does Invoice Automation bulk-send Xero invoices?

It fills New Invoice, then Send email: one address in To and up to 19 in BCC (20 per organisation), then continues with the next organisation on the same Xero login.

Is this for unsolicited bulk email?

No. You use accounts you control and must follow Gmail, Xero, and other platform terms and the law. See Terms.

Money pages · guides

From the blog.

Guides on bulk email software, SMTP, Gmail, Mailchimp alternatives, and deliverability.

Run Brahmastra bulk sending apps on your team PCs.

Request seats, download the Windows EXEs, and sign in with your Brahmastra license. Call or WhatsApp +91 6291 972 623.

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