CyberZip Studio
Building Digital Growth
Connect your Google Sheet or CSV in 1-click, compose high-converting personalized cold emails using dynamic merge tags {name}, embed rich media, and send securely via your Gmail 16-char App Password or Custom SMTP with anti-spam throttle protection.
Follow these step-by-step guides to set up Gmail App Passwords, format Google Sheets, configure custom SMTP, and maximize your inbox deliverability.
Google requires an App Password for third-party SMTP tools instead of your normal Gmail account password.
Visit myaccount.google.com/security and make sure 2-Step Verification is turned ON.
In the top search bar of Google Account, search for App passwords, or directly click this link: myaccount.google.com/apppasswords ↗.
Enter an app name like CyberZip Mailer and click Create.
Google will display a 16-character code (e.g. abcd efgh ijkl mnop). Copy it and paste it into the Password field of this Bulk Mailer. You are now ready to send!
Import hundreds of contacts effortlessly with 1-click Google Sheet sync.
Create a new sheet on Google Sheets with columns in Row 1: Name, Email, Business, Location.
Click the top-right Share button → under General Access, change from Restricted to "Anyone with the link can view".
Copy the sheet URL, paste it into the Google Sheet URL input above, and click Fetch Leads. Duplicate and previously sent emails are automatically filtered!
Send from your branded domain email address (e.g. hello@yourbrand.com).
| Provider | SMTP Host | Port | Encryption |
|---|---|---|---|
| Hostinger Webmail | smtp.hostinger.com |
587 or 465 |
TLS / SSL |
| cPanel Webmail | mail.yourdomain.com |
587 |
TLS |
| Brevo (Sendinblue) | smtp-relay.brevo.com |
587 |
TLS |
| Amazon SES | email-smtp.us-east-1.amazonaws.com |
587 |
TLS |
Personalization boosts email open rates by up to 142%.
You can insert dynamic merge tags anywhere in the Subject line or Body:
Hi {name},
I came across {business} in {location} and noticed you are scaling your digital operations. We help businesses engineer custom software, automated lead scrapers, and growth funnels.
Would you be open to a 5-minute quick walkthrough this week?
Best regards,
{from_name}
Follow these guidelines to ensure your emails reach the primary inbox rather than spam folders.
Cold email marketing is proven to deliver the highest ROI in digital acquisition (averaging $36 to $42 return for every $1 spent). While most enterprise email tools charge $50 to $300 every month for restrictive contact tiers, CyberZip Bulk Mailer is engineered as a 100% Lifetime Free Community Utility. It equips founders, digital agencies, freelancers, and B2B growth teams to launch personalized high-deliverability email outreach campaigns at zero cost.
Connect any public Google Sheet link in a single click. The mailer automatically parses recipient names, business info, and cities, while filtering duplicates and previously emailed contacts.
Easily hook up your personal Gmail or Google Workspace inbox using a secure 16-character Google App Password. No complex API consoles, OAuth client approvals, or developer verification required.
Send outreach from your custom branded domain via Hostinger, cPanel, Brevo (Sendinblue), Amazon SES, or SendGrid using TLS/SSL encrypted authentication on Port 587 or 465.
Hyper-personalize both Subject lines and Email Bodies with dynamic tokens: {name}, {email}, {business}, and {location} to increase open rates by up to 140%.
Automated 5-second sending intervals simulate organic human dispatch, preventing IP blacklists, avoiding ISP rate-limit triggers, and keeping your deliverability at the highest level.
Compliant with CAN-SPAM and global anti-spam regulations. Every email includes a clean 1-click unsubscribe header, and opted-out contacts are suppressed silently in the background.
Compare features and ongoing costs against expensive monthly alternatives.
| Feature / Capability | CyberZip Bulk Mailer | Mailchimp / Brevo | Lemlist / Woodpecker |
|---|---|---|---|
| Monthly Software Cost | ₹0 / Free Lifetime | $20 – $350 / mo | $59 – $99 / mo |
| Contact List Limits | Unlimited Contacts | Tiered by subscriber count | Restricted lead buckets |
| Google Sheets 1-Click Sync | Native Free 1-Click | Requires Zapier / Webhooks | Paid addon integration |
| Custom SMTP Freedom | Gmail, Hostinger, cPanel, SES | Locked to platform servers | Limited SMTP accounts |
| Anti-Spam Throttle Control | Configurable 5s Delay | Shared IP batching | Basic pacing |
| Account Registration / Lock-in | Zero Login / Instant Use | Mandatory registration & CC | Subscription required |
To achieve 99%+ primary inbox delivery and prevent spam folder routing, make sure your domain's DNS manager has the following three standard records configured:
v=spf1 include:_spf.google.com ~all
Authorizes your mail server IP to send on behalf of your domain.
v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com
Instructs recipient mail servers how to treat unauthenticated emails.
Never blast 1,000 emails on day one from a newly registered domain. Use this proven ramp-up schedule to build trust with spam filters:
{name} and {business} tags.myaccount.google.com/apppasswords) specifically for secure SMTP email transmission. It protects your primary Google password while allowing seamless third-party outreach.
{name} will replace the token with that specific lead's name (e.g. "John"), making each email personal and unique.