Free Mailbox Calculator
Calculate how many domains and mailboxes you need for cold email outreach and for what cost.
Watch How It Works
Video tutorials from the GiveMeLeads team.
How To Use This Tool
Understand why infrastructure matters
Cold email deliverability depends on how well you distribute your sending volume across domains and mailboxes. Sending too many emails from a single domain is the fastest way to get flagged as spam even if your copy is great.
Enter your sending volume
Enter the total number of emails you want to send per day, or use campaign settings mode to derive it from your list size, emails per lead, and campaign duration.
Read the risk indicators
The sending infrastructure sliders let you tune the ratio of mailboxes per domain and emails per mailbox per day. Risk indicators turn amber or red when you're pushing beyond safe deliverability thresholds. Try to stay as much as possible in the green zone.
