How to send multiple emails with different attachments in Gmail
Have you ever wondered how to send multiple emails with different attachments in Gmail? Well, you can now easily send a mass email or mail merge in Gmail…
GMass Blog
Email, Gmail, and GMass — explained.
Practical guides, product updates, deliverability research, and experiments from the team building GMass.
Continue reading →
The 5 Best YAMM Alternatives We Found (Unlimited Emails, More Features)
You’re here looking for YAMM alternatives (aka Yet Another Mail Merge) — and I get it. YAMM catches a lot of people’s eyes because it’s just about as cheap…
Advanced Techniques with the Google Picker API
If your app needs to let a user pick a file from his Google Drive, you might consider using the Google Picker API. I recently implemented the Picker…
A technical review of popular SMTP Services [2026]
Over the 20 years I’ve been building email marketing software, I’ve used or come across almost every SMTP service on the market. While plenty of articles exist comparing…
Top 3 Outreach.io Alternatives 2026 (Features, Pricing)
Are you looking for some great Outreach.io alternatives? While Outreach.io is a popular sales enablement platform, it has several flaws. For example, Outreach.io is very expensive and can…
Yet Another Mail Merge Review 2026 (Pricing, Features, Drawbacks)
Is Yet Another Mail Merge the right email marketing platform for you? This Yet Another Mail Merge review will help you find out if it’s a good fit…
Outreach.io Review 2026 (Features, Pros, Cons, Pricing)
Is Outreach.io the right email outreach tool for you? This detailed Outreach.io review will help you determine if it suits your email outreach needs or not. I’ll cover…
Google OAuth’s Incremental Authorization is Useless
If you uninstall our Chrome extension, a form pops up asking you for a reason, and one of the most common reasons given is that the permissions GMass…
Top 5 Outreach Tools For 2026 (Features, Pricing)
Looking for the perfect outreach tools to make more connections? Effective outreach campaigns are the backbone of any successful business. After all, you need to reach out to…
Top 3 SalesHandy Alternatives 2026 (Features, Pricing)
Looking for the best SalesHandy alternatives? While many businesses use SalesHandy as their go-to email tracking software, it has several drawbacks. It offers limited features in the base…
How to send a follow-up email campaign manually
One of the most popular techniques employed by cold emailers is the auto follow-up email sequence — emails that ping the prospect every few days until the prospect…
How to set hosted vs embedded images in Gmail
When you insert an image in the Gmail Compose window, the image is commonly inserted as an embedded image, meaning the full content of the image becomes a…