SMTP Archives - GMass Blog

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.

November 15, 2024

The 5 Best Cold Email Infrastructure Providers (Hands-On Reviews)

I tested out all the cold email infrastructure providers to figure out which are best options for deliverability, cost, setup, mailboxes, and more.

November 14, 2024

What Are Cold Email Infrastructure Services? (Helpful Guide, Recs, More)

Cold email infrastructure services are private sending servers — and also help set up domains, mailboxes, and more. Here's your complete guide.

November 5, 2024

How to Use Multiple SMTP Servers in GMass

With GMass you can add multiple SMTP servers to your account, to choose which one you use based on the campaign you're sending and breaking Gmail's limits.

September 17, 2024

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 …

January 26, 2024

How GMass Helps Gmail.com + SMTP Senders Achieve DMARC Compliance

Gmail.com users who send through an external SMTP service are not DMARC compliant. Here's GMass's solution to fix that so you meet Google's requirements.

September 6, 2023

How to Get Around Mimecast Blocks

Is Mimecast blocking the emails you're sending? Here are steps you can take to get around Mimecast blocks so your emails make it to the inbox properly.

August 22, 2023

How to Choose the Right SMTP Service for GMass

If you're going to use a third-party SMTP service to send high-volume email campaigns in GMass, here's what you want in the service you choose.

August 19, 2023

Confused About SMTP Options in GMass?

GMass offers a few different SMTP options: Using our accounts on other servers, our in-house server, transactional relay, and more. Here's how they differ.

August 17, 2023

How to Use the DKIM Settings in GMass — And Why You Should

How to set DKIM in GMass when you're using an SMTP service to send through Gmail, either your own SMTP account or one of GMass's in-house options.

September 15, 2022

Email Bounce Codes: The Complete Guide (Definitions, Solutions, and More)

A glossary of email bounce codes to help you understand why your emails weren't delivered. Plus steps and strategies to manage and to cut down on bounces.

April 21, 2022

How to Use GMass’s SMTP Relay to Send WordPress Transactional Emails

How to use GMass's SMTP relay service to send WordPress transactional emails like confirmations and receipts through your Gmail account.

Why GMass and SendGrid are better for campaigns

April 11, 2022

Why GMass + SendGrid is Better for Campaigns Than SendGrid Alone

You can send email campaigns via SendGrid's Marketing Campaigns — but it lacks the features of GMass. Instead, use GMass for emails with SendGrid for SMTP.

SMTP