How to get support
GMass is a low-cost, self-service system. We use Zendesk as our support ticketing system. We do not offer phone support or chat support. Before you submit a request,…
GMass Blog
Email, Gmail, and GMass — explained.
Practical guides, product updates, deliverability research, and experiments from the team building GMass.
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Creating Quality Email Content and Great Subject Lines
Make your Email Stand out as Relevant and Valuable First things first – and this cannot be emphasized enough – subject line is crucial. Subject lines not only…
Designing Successful Email Campaigns
GMass has one of the highest delivery rates in the email marketing industry, but delivery is only one component of a successful email campaign. Email marketing proves time…
How to get your invoices
If you’re a current or past paid subscriber, you can now view the invoices for your account. You can also customize your invoices with your company’s information. How…
Is There a Best Day to Launch an Email Marketing Campaign?
Conventional Wisdom on Email Timing is Evolving A 2016 email marketing study concluded that Emails sent on Saturdays generate 60% higher-than-average conversion rates. Wow! Everyone should start mailing…
How to transfer your subscription to another account
You can transfer your paid GMass subscription from one account to another, even if one account is a Gmail account and the other is a G Suite account.. Why…
How to update the credit card for your subscription
If you’ve previously subscribed to a paid GMass plan, at some point you may need to change or update the credit card associated with your account. This is…
Cancel your GMass subscription
How to cancel your subscription to GMass’s mail merge tool depends on whether you subscribed with a credit card or PayPal. Credit Card Subscriptions Two ways to cancel…
Manually Import or Remove Unsubscribe Addresses and the GMass Unsubscribe Features
In case you didn’t know, you can easily add email addresses to your account’s Unsubscribe List in GMass. With GMass’s unsubscribe management, any email addresses on your Unsubscribe…
What the “An Error occurred, but the error response could not be deserialized” error means
If you’ve sent a Gmail mail merge campaign with GMass and were notified that this error was generated while sending to your email addresses: An Error occurred, but the…
Video interview with GMass founder, Ajay Goel, on Growth Hacker TV
Check out this just-released Growth Hacker TV video interview with Ajay Goel, the creator of GMass. In this video, Ajay discusses the meteoric rise of GMass and the…
How to stop GMass from sending emails from your Gmail account
There are lots of reasons why you may need to stop GMass from sending emails from your Gmail account: GMass may have started sending a multi-day campaign, but…