Frostmailer Blog

Cold email infrastructure,
explained.

Guides, comparisons, and setup tips for agencies and founders running outbound at scale.

Cold Email5 min read
#1

Best Cold Email Mailboxes for Agencies 2026

The best cold email mailboxes combine low per-inbox cost, included domains, and pre-configured DNS. Here's what agencies should use in 2026.

Read article
Cold Email5 min read
#2

Azure vs Google Workspace for Cold Email: Which Should You Choose in 2026?

Azure at $1/inbox vs Google at $2.80/inbox — a complete breakdown of cost, sending limits, and which to choose for your cold email setup.

Read article