How to Use the DKIM Settings in GMass — And Why You Should
Many Gmail users never touch SPF, DKIM, or DMARC — because Google takes care of behind-the-scenes technical details well enough to make sure your emails generally make it…
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 →
Email Bounce Codes: The Complete Guide (Definitions, Solutions, and More)
Bounces are an unfortunate but inevitable part of sending email (especially mass email). When you send a message to a recipient and, for whatever reason, that message can’t…
How to Use GMass’s SMTP Relay to Send WordPress Transactional Emails
GMass offers subscribers a standalone SMTP service to send your transactional emails through your Gmail account. (Transactional emails are the essential, non-promotional business emails you send like receipts…
Why GMass + SendGrid is Better for Campaigns Than SendGrid Alone
SendGrid is the biggest name in the SMTP world — and there’s a reason. SendGrid has been around forever (well, since 2009, which is “forever” on the internet)…
Introducing a New Kind of SMTP Service (Transactional Emails in Gmail)
If you have a website, app, or blog, you’ve likely connected to a transactional email service through a transactional email API or an SMTP service. Popular SMTP services…
Postmark Review 2026 (Features, Limitations, Pricing)
Interested in using Postmark for your email marketing and SMTP needs? Postmark is an SMTP service provider that focuses on improving your deliverability rates. With an email API,…
SMTP.com Review 2026 (Features, Drawbacks, Pricing)
Looking for a comprehensive SMTP.com review? SMTP.com is a tool used by marketers to send mass marketing and transactional emails. It’s a powerful SMTP tool that helps your…
Mandrill Review 2026 (Features, Pricing, Drawbacks)
Looking for an in-depth Mandrill review? Developed by Mailchimp, Mandrill is a SaaS-based transactional email service that lets you send personalized transactional emails to your customers. But despite…
Proof that Google allows sending from a gmail.com account through an external SMTP server
Ever since we launched the ability to hook your account up to an external SMTP provider and essentially “break” Gmail’s sending limits, one of the questions we get…
The Ultimate Guide to SMTP (2026 update)
Interested in learning about how SMTP works? While sending and receiving emails through an email client seems simple, there’s a lot happening behind the scenes to deliver an…
Setting Up Office 365 SMTP Settings (Updated Guide)
Want to set up Office 365 SMTP settings for your email account? In this article, I’ll cover everything you need to know about your Office 365 SMTP settings.…
Outlook SMTP Settings (2026 Guide)
Microsoft Outlook’s SMTP settings let you configure the email client of your choice (Gmail, Yahoo, Thunderbird, etc.) to send emails from your Outlook address. Alternatively, you can configure…