Apply to send beyond Gmail’s limits.

We operate our own SMTP infrastructure for qualified GMass users. If your recipients explicitly opted in, tell us how you send and we’ll review whether our in-house SMTP service is a fit.

This application is for opt-in mailers.

If your recipients explicitly opted in to receive your messages, complete this form. If you send non-opt-in cold email, ColdSMTP is the better option.

Who qualifies Established opt-in senders

Be specific about where your recipients came from and why they expect your mail.

What it does Send beyond Gmail’s natural limits

Approved accounts can route campaign mail through GMass-controlled SMTP servers.

Usage A generous allowance is included

SMTP usage fees apply after the included allowance. See details.

Tell us about your sending.

Detailed answers help us evaluate the application faster. Use the same Google account you already use with GMass—not a Gmail alias.

Your GMass account

This must be the Gmail or Google Workspace address you use to log in to GMass.

Email address

Please provide a valid email address.

How did recipients join your list?

Explain exactly how people gave you permission to email them.

How have you gathered your email addresses?

Please explain how you gathered your email addresses.

A strong answer: identifies the signup source, the nature of the opt-in, and—when possible—a URL where the signup happens.

What will you send?

Describe the messages your recipients should expect to receive.

What kinds of emails are you going to send?

Please describe the kinds of emails you plan to send.

How much will you send?

Give us a realistic picture of both campaign size and frequency.

To how many people will an average mailing go?

Please tell us your typical mailing size.

How frequently will you send a campaign?

Please tell us how frequently you expect to send.

Before submitting, make sure the email above is already associated with a GMass account and that your answers accurately describe your opt-in process and expected sending.

Please complete the highlighted fields before submitting.