Send Bulk Emails Through Gmail Automatically
Paste your recipient list, write your message, hit send. Mailio handles the rest — compose, fill, and send — one by one through your Gmail account.
Three steps to bulk email
No SMTP setup. No API keys. Works with your existing Gmail account.
Install the Extension
Download Mailio from the Chrome Web Store. One click install, no configuration needed.
Paste Your List
Open the sidebar, paste your email addresses one per line, write your subject and message.
Click Send
Mailio opens Gmail compose, fills in each recipient automatically, and sends — one by one.
Everything you need
Powerful enough for bulk campaigns, simple enough for anyone to use.
Bulk Recipient List
Paste hundreds of emails at once — one per line. Mailio sends to each individually so it never looks like a mass blast.
Rich Message Editor
Bold, italic, bullet lists, hyperlinks — format your email just like you would in Gmail itself.
File Attachments
Attach PDFs, images, and documents. Each recipient gets the same attachment automatically.
Smart Send Delay
Set 3–15 second delays between emails. Keeps your account safe and avoids spam detection.
Your Gmail Account
Emails come from your own Gmail. No third-party servers, no email spoofing — 100% authentic.
Live Send Progress
Watch a live log as each email is sent. Know exactly what was sent and what failed in real time.
Simple, honest pricing
Start free. Upgrade when you need more.
Perfect for trying it out. No credit card needed.
- 10 recipients per day
- Rich message editor
- File attachments
- Send delay control
- Priority support
For @gmail.com accounts. Best for individuals and small teams.
- 400 recipients per day
- Rich message editor
- File attachments
- Smart send delay
- Priority support
For Google Workspace accounts. Built for businesses.
- 1500 recipients per day
- Rich message editor
- File attachments
- Smart send delay
- Priority support
What our users say
"I used to spend 2 hours manually sending emails to my clients. With Mailio I just paste the list and it sends everything while I do other work."
"Simple, affordable, and it just works. The best part is emails come from my own Gmail so everyone actually opens them."
"We switched from a paid ESP to Mailio Workspace Pro. Save money, better delivery rate, and no complex setup. Highly recommend."