How GMass’s “From Address” Replacement System Works
GMass’s From address replacement system is our way of making sure you can send high-volume campaigns through GMass using an SMTP service without failing DMARC authentication. If there are…
GMass Blog
Category: SMTP
As an email platform, we’re eyeballs deep in the world of SMTP here at GMass.
And here in the SMTP archives you’ll find everything we’ve written on the GMass blog about SMTP, including:
- How to use a third-party SMTP with GMass to break Gmail’s limits and send virtually unlimited emails
- GMass’s own SMTP service for transactional emails
- Reviews of SMTP services
- Our tools to analyze your SMTP settings to flag any potential issue
- And all other SMTP-related tips and findings
You may also be interested in our page on GMass’s SMTP integration, where you can learn all about how GMass works with external SMTP services in one place.
Continue reading →
Hit Gmail’s Limits? Get Instant Approval to Keep Sending Thru GMass’s Server
You can now send GIANT email campaigns with zero technical setup or complexity, straight from your Gmail account. No one else but GMass makes this possible. Here’s how… Instant Approvals…
The 3 Best Methods to Send High-Volume Cold Emails in 2026
I’m an active participant in several cold email Facebook groups and subreddits. And every day — literally, every single day — someone posts that they need to send…
ColdSMTP: GMass’s Game-Changing Cold Email Sending Server
To apply to use ColdSMTP, our cold email sending server, please fill out this form. Cold email has lost its way. Every day — EVERY day — I…
The 5 Best Cold Email Infrastructure Providers (Hands-On Reviews)
I just tried out pretty much every option on the market to find the best cold email infrastructure services — and this is what I found. But before…
What Are Cold Email Infrastructure Services? (Helpful Guide, Recs, More)
Cold email infrastructure services are one of the hottest recent trends in this endless war between outreach pros and deliverability. These services have set up their own complete…
How to Use Multiple SMTP Servers in GMass
With GMass, you can break Gmail’s daily sending limits to send unlimited emails in Gmail — and the most popular way is by using a SMTP server to send the…
How to Send Transactional Emails with the GMass API
You can send full-fledged email campaigns using the GMass API. But… you can also use the GMass API to send single, one-off messages through your Gmail/Google Workspace account. Those…
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…
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…