Last year GMass introduced the ability to send unlimited emails by connecting a third party SMTP service to your account. This allows you to effectively break Gmail's sending limits.

If you're sending strictly opt-in email, you might be eligible to use our SendGrid account as your SMTP service, rather than setting up an SMTP service on your own.

We are selective about who we let use our SendGrid account, so please don't take offense if we deny your request. Additionally, it can take a couple days for us to review your request, since we manually review every user's sending history to determine if you are eligible.