How to Set Up DMARC Authentication (Fast Beginner’s Guide – New!)
This article is a beginner’s guide on how to set up DMARC because, really, DMARC sounds more technically intimidating than it actually is. In this guide I’m going to cover…
GMass Blog
Author: Sam Greenspan
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How GMass Helps Gmail.com + SMTP Senders Achieve DMARC Compliance
It’s not too complicated to follow Google and Yahoo’s new bulk sender requirements, which go into effect February 1st, 2024. With one exception. There’s a subset of GMass users who…
Set Up SPF Authentication in Under 5 Mins (Easy Beginner’s Guide)
It’s not hard to set up SPF. I promise. However, the process can be intimidating to beginners, especially since the odds are (1) you’ve heard you need SPF…
Gmail Bulk Sender Guidelines: The 2026 Rules They Actually Enforce
It finally happened: in November 2025, Google actually started enforcing its Gmail bulk sender guidelines. The rules themselves haven’t changed much since they were announced in October 2023…
5 Impressive Ways Email Marketers Are Using GMass’s Triggered Emails
GMass’s triggered emails open up a whole new world of email marketing strategies — and some pros are taking full advantage. For those unfamiliar, triggered emails are automated messages that go…
5 Great Ways Cold Emailers Are Using GMass’s Triggered Emails
Triggered emails are a relatively new feature in GMass but have quickly become a popular and unique way for cold emailers to stand out from the masses, to hit…
Why GMass Is Better Than Instantly for Cold Email
If you’re deciding between GMass vs Instantly, here’s everything you could possibly need to know. GMass and Instantly are two popular cold email platforms — though there are some significant differences…
GMass MultiSend: Inbox Rotation to Distribute a Campaign Across Multiple Email Accounts
With GMass’s MultiSend you can send large campaigns bu distributing a single email campaign across multiple email accounts. So if you’re sending a campaign to 1,000 people, GMass…
How to Automatically Apply a Google Sheets Formula to a New Row
You’re not always going to be able to drag a formula down a column in Google Sheets. Sometimes, you need Google Sheets to automatically apply the formula to…
How to Get Around Mimecast Blocks
So… you sent an email campaign. And you got a block bounce notification from one or more recipients — because they use Mimecast, which blocked your message. It happens.…
How to Choose the Right SMTP Service for GMass
Want to use a third-party SMTP service with GMass to break Gmail’s limits and send your high-volume campaigns? That’s one of the popular SMTP options with GMass — especially…
Confused About SMTP Options in GMass?
At GMass, we offer a handful of different SMTP options that serve different purposes. And we know it’s possible for it to get a bit confusing. So I put…