The Signal Journal
Cold Email Blog
Tips, strategies, and field-tested guides for cold email success, deliverability, AI personalization, and outbound sales.
Jun 19, 2026
How Many Email Accounts You Need for Cold Email
Sending 200 or 1,000 cold emails a day takes more than one inbox. Here is the simple math for how many email accounts and domains you need, and how ro...
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Jun 19, 2026
Own SMTP for Cold Email: When to Use It and How to Set Up
Should you send cold email through your own SMTP instead of a vendor's pool? Here is when bring-your-own SMTP wins, what it costs, and how to set it u...
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Jun 19, 2026
Why Are My Cold Emails Going to Spam? 9 Fixes That Work in 2026
Cold emails landing in spam usually comes down to authentication, reputation, and a few content habits. Here are the nine fixes that actually move the...
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