The StackMail Blog
Cold email infrastructure tips, deliverability guides, and everything you need to scale outbound.
How Many Domains Do You Need for Cold Email in 2026?
Published Feb 15, 2026·6 min read
How Many Domains Do You Need for Cold Email in 2026?
The right number of domains depends on your sending volume, target audience, and risk tolerance. Here's a framework to figure out what you need.
Cold EmailGoogle Workspace vs Microsoft 365 for Cold Email: Which One?
Published Feb 7, 2026·5 min read
Google Workspace vs Microsoft 365 for Cold Email: Which One?
Both providers work great for cold email, but each has distinct advantages. Here's an honest comparison to help you decide.
Cold EmailHow Agencies Should Set Up Cold Email Infrastructure at Scale
Published Jan 17, 2026·8 min read
How Agencies Should Set Up Cold Email Infrastructure at Scale
Managing cold email infrastructure for multiple clients requires a different approach. Here's how top agencies structure their setup.
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